divert(-1) # # Copyright (c) 1998-2009 Sendmail, Inc. and its suppliers. # All rights reserved. # Copyright (c) 1983, 1995 Eric P. Allman. All rights reserved. # Copyright (c) 1988, 1993 # The Regents of the University of California. All rights reserved. # # Copyright 2004 Sun Microsystems, Inc. All rights reserved. # Use is subject to license terms. # # By using this file, you agree to the terms and conditions set # forth in the LICENSE file which can be found at the top level of # the sendmail distribution. # # divert(0) VERSIONID(`$Id: proto.m4,v 8.741 2009/12/11 00:04:53 ca Exp $') # level CF_LEVEL config file format V`'CF_LEVEL/ifdef(`VENDOR_NAME', `VENDOR_NAME', `Sun') divert(-1) dnl if MAILER(`local') not defined: do it ourself; be nice dnl maybe we should issue a warning? ifdef(`_MAILER_local_',`', `MAILER(local)') # do some sanity checking ifdef(`__OSTYPE__',, `errprint(`*** ERROR: No system type defined (use OSTYPE macro) ')') # pick our default mailers ifdef(`confSMTP_MAILER',, `define(`confSMTP_MAILER', `esmtp')') ifdef(`confLOCAL_MAILER',, `define(`confLOCAL_MAILER', `local')') ifdef(`confRELAY_MAILER',, `define(`confRELAY_MAILER', `ifdef(`_MAILER_smtp_', `relay', `ifdef(`_MAILER_uucp', `uucp-new', `unknown')')')') ifdef(`confUUCP_MAILER',, `define(`confUUCP_MAILER', `uucp-old')') define(`_SMTP_', `confSMTP_MAILER')dnl for readability only define(`_LOCAL_', `confLOCAL_MAILER')dnl for readability only define(`_RELAY_', `confRELAY_MAILER')dnl for readability only define(`_UUCP_', `confUUCP_MAILER')dnl for readability only # back compatibility with old config files ifdef(`confDEF_GROUP_ID', `errprint(`*** confDEF_GROUP_ID is obsolete. Use confDEF_USER_ID with a colon in the value instead. ')') ifdef(`confREAD_TIMEOUT', `errprint(`*** confREAD_TIMEOUT is obsolete. Use individual confTO_ parameters instead. ')') ifdef(`confMESSAGE_TIMEOUT', `define(`_ARG_', index(confMESSAGE_TIMEOUT, /)) ifelse(_ARG_, -1, `define(`confTO_QUEUERETURN', confMESSAGE_TIMEOUT)', `define(`confTO_QUEUERETURN', substr(confMESSAGE_TIMEOUT, 0, _ARG_)) define(`confTO_QUEUEWARN', substr(confMESSAGE_TIMEOUT, eval(_ARG_+1)))')') ifdef(`confMIN_FREE_BLOCKS', `ifelse(index(confMIN_FREE_BLOCKS, /), -1,, `errprint(`*** compound confMIN_FREE_BLOCKS is obsolete. Use confMAX_MESSAGE_SIZE for the second part of the value. ')')') # Sanity check on ldap_routing feature # If the user doesn't specify a new map, they better have given as a # default LDAP specification which has the LDAP base (and most likely the host) ifdef(`confLDAP_DEFAULT_SPEC',, `ifdef(`_LDAP_ROUTING_WARN_', `errprint(` WARNING: Using default FEATURE(ldap_routing) map definition(s) without setting confLDAP_DEFAULT_SPEC option. ')')')dnl # clean option definitions below.... define(`_OPTION', `ifdef(`$2', `O $1`'ifelse(defn(`$2'), `',, `=$2')', `#O $1`'ifelse(`$3', `',,`=$3')')')dnl dnl required to "rename" the check_* rulesets... define(`_U_',ifdef(`_DELAY_CHECKS_',`',`_')) dnl default relaying denied message ifdef(`confRELAY_MSG', `', `define(`confRELAY_MSG', ifdef(`_USE_AUTH_', `"550 Relaying denied. Proper authentication required."', `"550 Relaying denied"'))') ifdef(`confRCPTREJ_MSG', `', `define(`confRCPTREJ_MSG', `"550 Mailbox disabled for this recipient"')') define(`_CODE553', `553') divert(0)dnl # override file safeties - setting this option compromises system security, # addressing the actual file configuration problem is preferred # need to set this before any file actions are encountered in the cf file _OPTION(DontBlameSendmail, `confDONT_BLAME_SENDMAIL', `safe') # default LDAP map specification # need to set this now before any LDAP maps are defined _OPTION(LDAPDefaultSpec, `confLDAP_DEFAULT_SPEC', `-h localhost') ################## # local info # ################## # my LDAP cluster # need to set this before any LDAP lookups are done (including classes) ifdef(`confLDAP_CLUSTER', `D{sendmailMTACluster}`'confLDAP_CLUSTER', `#D{sendmailMTACluster}$m') Cwlocalhost ifdef(`USE_CW_FILE', `# file containing names of hosts for which we receive email Fw`'confCW_FILE', `dnl') # my official domain name # ... `define' this only if sendmail cannot automatically determine your domain ifdef(`confDOMAIN_NAME', `Dj`'confDOMAIN_NAME', `#Dj$w.Foo.COM') # host/domain names ending with a token in class P are canonical CP. ifdef(`UUCP_RELAY', `# UUCP relay host DY`'UUCP_RELAY CPUUCP ')dnl ifdef(`BITNET_RELAY', `# BITNET relay host DB`'BITNET_RELAY CPBITNET ')dnl ifdef(`DECNET_RELAY', `define(`_USE_DECNET_SYNTAX_', 1)dnl # DECnet relay host DC`'DECNET_RELAY CPDECNET ')dnl ifdef(`FAX_RELAY', `# FAX relay host DF`'FAX_RELAY CPFAX ')dnl # "Smart" relay host (may be null) DS`'ifdef(`SMART_HOST', `SMART_HOST') ifdef(`LUSER_RELAY', `dnl # place to which unknown users should be forwarded Kuser user -m -a<> DL`'LUSER_RELAY', `dnl') # operators that cannot be in local usernames (i.e., network indicators) CO @ % ifdef(`_NO_UUCP_', `', `!') # a class with just dot (for identifying canonical names) C.. # a class with just a left bracket (for identifying domain literals) C[[ ifdef(`_ACCESS_TABLE_', `dnl # access_db acceptance class C{Accept}OK RELAY ifdef(`_DELAY_COMPAT_8_10_',`dnl ifdef(`_BLACKLIST_RCPT_',`dnl # possible access_db RHS for spam friends/haters C{SpamTag}SPAMFRIEND SPAMHATER')')', `dnl') dnl mark for "domain is ok" (resolved or accepted anyway) define(`_RES_OK_', `OKR')dnl ifdef(`_ACCEPT_UNRESOLVABLE_DOMAINS_',`dnl',`dnl # Resolve map (to check if a host exists in check_mail) Kresolve host -a<_RES_OK_> -T') C{ResOk}_RES_OK_ ifdef(`_NEED_MACRO_MAP_', `dnl ifdef(`_MACRO_MAP_', `', `# macro storage map define(`_MACRO_MAP_', `1')dnl Kmacro macro')', `dnl') ifdef(`confCR_FILE', `dnl # Hosts for which relaying is permitted ($=R) FR`'confCR_FILE', `dnl') define(`TLS_SRV_TAG', `"TLS_Srv"')dnl define(`TLS_CLT_TAG', `"TLS_Clt"')dnl define(`TLS_RCPT_TAG', `"TLS_Rcpt"')dnl define(`TLS_TRY_TAG', `"Try_TLS"')dnl define(`SRV_FEAT_TAG', `"Srv_Features"')dnl dnl this may be useful in other contexts too ifdef(`_ARITH_MAP_', `', `# arithmetic map define(`_ARITH_MAP_', `1')dnl Karith arith') ifdef(`_ACCESS_TABLE_', `dnl ifdef(`_MACRO_MAP_', `', `# macro storage map define(`_MACRO_MAP_', `1')dnl Kmacro macro') # possible values for TLS_connection in access map C{Tls}VERIFY ENCR', `dnl') ifdef(`_CERT_REGEX_ISSUER_', `dnl # extract relevant part from cert issuer KCERTIssuer regex _CERT_REGEX_ISSUER_', `dnl') ifdef(`_CERT_REGEX_SUBJECT_', `dnl # extract relevant part from cert subject KCERTSubject regex _CERT_REGEX_SUBJECT_', `dnl') ifdef(`LOCAL_RELAY', `dnl # who I send unqualified names to if `FEATURE(stickyhost)' is used # (null means deliver locally) DR`'LOCAL_RELAY') ifdef(`MAIL_HUB', `dnl # who gets all local email traffic # ($R has precedence for unqualified names if `FEATURE(stickyhost)' is used) DH`'MAIL_HUB') # dequoting map Kdequote dequote`'ifdef(`confDEQUOTE_OPTS', ` confDEQUOTE_OPTS', `') divert(0)dnl # end of nullclient diversion # class E: names that should be exposed as from this host, even if we masquerade # class L: names that should be delivered locally, even if we have a relay # class M: domains that should be converted to $M # class N: domains that should not be converted to $M #CL root undivert(5)dnl ifdef(`_VIRTHOSTS_', `CR$={VirtHost}', `dnl') ifdef(`MASQUERADE_NAME', `dnl # who I masquerade as (null for no masquerading) (see also $=M) DM`'MASQUERADE_NAME') # my name for error messages ifdef(`confMAILER_NAME', `Dn`'confMAILER_NAME', `#DnMAILER-DAEMON') undivert(6)dnl LOCAL_CONFIG include(_CF_DIR_`m4/version.m4') ############### # Options # ############### ifdef(`confAUTO_REBUILD', `errprint(WARNING: `confAUTO_REBUILD' is no longer valid. There was a potential for a denial of service attack if this is set. )')dnl # strip message body to 7 bits on input? _OPTION(SevenBitInput, `confSEVEN_BIT_INPUT', `False') # 8-bit data handling _OPTION(EightBitMode, `confEIGHT_BIT_HANDLING', `pass8') # wait for alias file rebuild (default units: minutes) _OPTION(AliasWait, `confALIAS_WAIT', `5m') # location of alias file _OPTION(AliasFile, `ALIAS_FILE', `MAIL_SETTINGS_DIR`'aliases') # minimum number of free blocks on filesystem _OPTION(MinFreeBlocks, `confMIN_FREE_BLOCKS', `100') # maximum message size _OPTION(MaxMessageSize, `confMAX_MESSAGE_SIZE', `0') # substitution for space (blank) characters _OPTION(BlankSub, `confBLANK_SUB', `_') # avoid connecting to "expensive" mailers on initial submission? _OPTION(HoldExpensive, `confCON_EXPENSIVE', `False') # checkpoint queue runs after every N successful deliveries _OPTION(CheckpointInterval, `confCHECKPOINT_INTERVAL', `10') # default delivery mode _OPTION(DeliveryMode, `confDELIVERY_MODE', `background') # error message header/file _OPTION(ErrorHeader, `confERROR_MESSAGE', `MAIL_SETTINGS_DIR`'error-header') # error mode _OPTION(ErrorMode, `confERROR_MODE', `print') # save Unix-style "From_" lines at top of header? _OPTION(SaveFromLine, `confSAVE_FROM_LINES', `False') # queue file mode (qf files) _OPTION(QueueFileMode, `confQUEUE_FILE_MODE', `0600') # temporary file mode _OPTION(TempFileMode, `confTEMP_FILE_MODE', `0600') # match recipients against GECOS field? _OPTION(MatchGECOS, `confMATCH_GECOS', `False') # maximum hop count _OPTION(MaxHopCount, `confMAX_HOP', `25') # location of help file O HelpFile=ifdef(`HELP_FILE', HELP_FILE, `MAIL_SETTINGS_DIR`'helpfile') # ignore dots as terminators in incoming messages? _OPTION(IgnoreDots, `confIGNORE_DOTS', `False') # name resolver options _OPTION(ResolverOptions, `confBIND_OPTS', `+AAONLY') # deliver MIME-encapsulated error messages? _OPTION(SendMimeErrors, `confMIME_FORMAT_ERRORS', `True') # Forward file search path _OPTION(ForwardPath, `confFORWARD_PATH', `/var/forward/$u:$z/.forward.$w:$z/.forward') # open connection cache size _OPTION(ConnectionCacheSize, `confMCI_CACHE_SIZE', `2') # open connection cache timeout _OPTION(ConnectionCacheTimeout, `confMCI_CACHE_TIMEOUT', `5m') # persistent host status directory _OPTION(HostStatusDirectory, `confHOST_STATUS_DIRECTORY', `.hoststat') # single thread deliveries (requires HostStatusDirectory)? _OPTION(SingleThreadDelivery, `confSINGLE_THREAD_DELIVERY', `False') # use Errors-To: header? _OPTION(UseErrorsTo, `confUSE_ERRORS_TO', `False') # log level _OPTION(LogLevel, `confLOG_LEVEL', `10') # send to me too, even in an alias expansion? _OPTION(MeToo, `confME_TOO', `True') # verify RHS in newaliases? _OPTION(CheckAliases, `confCHECK_ALIASES', `False') # default messages to old style headers if no special punctuation? _OPTION(OldStyleHeaders, `confOLD_STYLE_HEADERS', `False') # SMTP daemon options ifelse(defn(`confDAEMON_OPTIONS'), `', `dnl', `errprint(WARNING: `confDAEMON_OPTIONS' is no longer valid. Use `DAEMON_OPTIONS()'; see cf/README. )'dnl `DAEMON_OPTIONS(`confDAEMON_OPTIONS')') ifelse(defn(`_DPO_'), `', `ifdef(`_NETINET6_', `O DaemonPortOptions=Name=MTA-v4, Family=inet O DaemonPortOptions=Name=MTA-v6, Family=inet6',`O DaemonPortOptions=Name=MTA')', `_DPO_') ifdef(`_NO_MSA_', `dnl', `O DaemonPortOptions=Port=587, Name=MSA, M=E') # SMTP client options ifelse(defn(`confCLIENT_OPTIONS'), `', `dnl', `errprint(WARNING: `confCLIENT_OPTIONS' is no longer valid. See cf/README for more information. )'dnl `CLIENT_OPTIONS(`confCLIENT_OPTIONS')') ifelse(defn(`_CPO_'), `', `#O ClientPortOptions=Family=inet, Address=0.0.0.0', `_CPO_') # Modifiers to `define' {daemon_flags} for direct submissions _OPTION(DirectSubmissionModifiers, `confDIRECT_SUBMISSION_MODIFIERS', `') # Use as mail submission program? See sendmail/SECURITY _OPTION(UseMSP, `confUSE_MSP', `') # privacy flags _OPTION(PrivacyOptions, `confPRIVACY_FLAGS', `authwarnings') # who (if anyone) should get extra copies of error messages _OPTION(PostmasterCopy, `confCOPY_ERRORS_TO', `Postmaster') # slope of queue-only function _OPTION(QueueFactor, `confQUEUE_FACTOR', `600000') # limit on number of concurrent queue runners _OPTION(MaxQueueChildren, `confMAX_QUEUE_CHILDREN', `') # maximum number of queue-runners per queue-grouping with multiple queues _OPTION(MaxRunnersPerQueue, `confMAX_RUNNERS_PER_QUEUE', `1') # priority of queue runners (nice(3)) _OPTION(NiceQueueRun, `confNICE_QUEUE_RUN', `') # shall we sort the queue by hostname first? _OPTION(QueueSortOrder, `confQUEUE_SORT_ORDER', `priority') # minimum time in queue before retry _OPTION(MinQueueAge, `confMIN_QUEUE_AGE', `30m') # how many jobs can you process in the queue? _OPTION(MaxQueueRunSize, `confMAX_QUEUE_RUN_SIZE', `0') # perform initial split of envelope without checking MX records _OPTION(FastSplit, `confFAST_SPLIT', `1') # queue directory O QueueDirectory=ifdef(`QUEUE_DIR', QUEUE_DIR, `/var/spool/mqueue') # key for shared memory; 0 to turn off, -1 to auto-select _OPTION(SharedMemoryKey, `confSHARED_MEMORY_KEY', `0') # file to store auto-selected key for shared memory (SharedMemoryKey = -1) _OPTION(SharedMemoryKeyFile, `confSHARED_MEMORY_KEY_FILE', `') # timeouts (many of these) _OPTION(Timeout.initial, `confTO_INITIAL', `5m') _OPTION(Timeout.connect, `confTO_CONNECT', `5m') _OPTION(Timeout.aconnect, `confTO_ACONNECT', `0s') _OPTION(Timeout.iconnect, `confTO_ICONNECT', `5m') _OPTION(Timeout.helo, `confTO_HELO', `5m') _OPTION(Timeout.mail, `confTO_MAIL', `10m') _OPTION(Timeout.rcpt, `confTO_RCPT', `1h') _OPTION(Timeout.datainit, `confTO_DATAINIT', `5m') _OPTION(Timeout.datablock, `confTO_DATABLOCK', `1h') _OPTION(Timeout.datafinal, `confTO_DATAFINAL', `1h') _OPTION(Timeout.rset, `confTO_RSET', `5m') _OPTION(Timeout.quit, `confTO_QUIT', `2m') _OPTION(Timeout.misc, `confTO_MISC', `2m') _OPTION(Timeout.command, `confTO_COMMAND', `1h') _OPTION(Timeout.ident, `confTO_IDENT', `5s') _OPTION(Timeout.fileopen, `confTO_FILEOPEN', `60s') _OPTION(Timeout.control, `confTO_CONTROL', `2m') _OPTION(Timeout.queuereturn, `confTO_QUEUERETURN', `5d') _OPTION(Timeout.queuereturn.normal, `confTO_QUEUERETURN_NORMAL', `5d') _OPTION(Timeout.queuereturn.urgent, `confTO_QUEUERETURN_URGENT', `2d') _OPTION(Timeout.queuereturn.non-urgent, `confTO_QUEUERETURN_NONURGENT', `7d') _OPTION(Timeout.queuereturn.dsn, `confTO_QUEUERETURN_DSN', `5d') _OPTION(Timeout.queuewarn, `confTO_QUEUEWARN', `4h') _OPTION(Timeout.queuewarn.normal, `confTO_QUEUEWARN_NORMAL', `4h') _OPTION(Timeout.queuewarn.urgent, `confTO_QUEUEWARN_URGENT', `1h') _OPTION(Timeout.queuewarn.non-urgent, `confTO_QUEUEWARN_NONURGENT', `12h') _OPTION(Timeout.queuewarn.dsn, `confTO_QUEUEWARN_DSN', `4h') _OPTION(Timeout.hoststatus, `confTO_HOSTSTATUS', `30m') _OPTION(Timeout.resolver.retrans, `confTO_RESOLVER_RETRANS', `5s') _OPTION(Timeout.resolver.retrans.first, `confTO_RESOLVER_RETRANS_FIRST', `5s') _OPTION(Timeout.resolver.retrans.normal, `confTO_RESOLVER_RETRANS_NORMAL', `5s') _OPTION(Timeout.resolver.retry, `confTO_RESOLVER_RETRY', `4') _OPTION(Timeout.resolver.retry.first, `confTO_RESOLVER_RETRY_FIRST', `4') _OPTION(Timeout.resolver.retry.normal, `confTO_RESOLVER_RETRY_NORMAL', `4') _OPTION(Timeout.lhlo, `confTO_LHLO', `2m') _OPTION(Timeout.auth, `confTO_AUTH', `10m') _OPTION(Timeout.starttls, `confTO_STARTTLS', `1h') # time for DeliverBy; extension disabled if less than 0 _OPTION(DeliverByMin, `confDELIVER_BY_MIN', `0') # should we not prune routes in route-addr syntax addresses? _OPTION(DontPruneRoutes, `confDONT_PRUNE_ROUTES', `False') # queue up everything before forking? _OPTION(SuperSafe, `confSAFE_QUEUE', `True') # status file _OPTION(StatusFile, `STATUS_FILE') # time zone handling: # if undefined, use system default # if defined but null, use TZ envariable passed in # if defined and non-null, use that info ifelse(confTIME_ZONE, `USE_SYSTEM', `#O TimeZoneSpec=', confTIME_ZONE, `USE_TZ', `O TimeZoneSpec=', `O TimeZoneSpec=confTIME_ZONE') # default UID (can be username or userid:groupid) _OPTION(DefaultUser, `confDEF_USER_ID', `mailnull') # list of locations of user database file (null means no lookup) _OPTION(UserDatabaseSpec, `confUSERDB_SPEC', `MAIL_SETTINGS_DIR`'userdb') # fallback MX host _OPTION(FallbackMXhost, `confFALLBACK_MX', `fall.back.host.net') # fallback smart host _OPTION(FallbackSmartHost, `confFALLBACK_SMARTHOST', `fall.back.host.net') # if we are the best MX host for a site, try it directly instead of config err _OPTION(TryNullMXList, `confTRY_NULL_MX_LIST', `False') # load average at which we just queue messages _OPTION(QueueLA, `confQUEUE_LA', `8') # load average at which we refuse connections _OPTION(RefuseLA, `confREFUSE_LA', `12') # log interval when refusing connections for this long _OPTION(RejectLogInterval, `confREJECT_LOG_INTERVAL', `3h') # load average at which we delay connections; 0 means no limit _OPTION(DelayLA, `confDELAY_LA', `0') # maximum number of children we allow at one time _OPTION(MaxDaemonChildren, `confMAX_DAEMON_CHILDREN', `0') # maximum number of new connections per second _OPTION(ConnectionRateThrottle, `confCONNECTION_RATE_THROTTLE', `0') # Width of the window _OPTION(ConnectionRateWindowSize, `confCONNECTION_RATE_WINDOW_SIZE', `60s') # work recipient factor _OPTION(RecipientFactor, `confWORK_RECIPIENT_FACTOR', `30000') # deliver each queued job in a separate process? _OPTION(ForkEachJob, `confSEPARATE_PROC', `False') # work class factor _OPTION(ClassFactor, `confWORK_CLASS_FACTOR', `1800') # work time factor _OPTION(RetryFactor, `confWORK_TIME_FACTOR', `90000') # default character set _OPTION(DefaultCharSet, `confDEF_CHAR_SET', `unknown-8bit') # service switch file (name hardwired on Solaris, Ultrix, OSF/1, others) _OPTION(ServiceSwitchFile, `confSERVICE_SWITCH_FILE', `MAIL_SETTINGS_DIR`'service.switch') # hosts file (normally /etc/hosts) _OPTION(HostsFile, `confHOSTS_FILE', `/etc/hosts') # dialup line delay on connection failure _OPTION(DialDelay, `confDIAL_DELAY', `0s') # action to take if there are no recipients in the message _OPTION(NoRecipientAction, `confNO_RCPT_ACTION', `none') # chrooted environment for writing to files _OPTION(SafeFileEnvironment, `confSAFE_FILE_ENV', `') # are colons OK in addresses? _OPTION(ColonOkInAddr, `confCOLON_OK_IN_ADDR', `True') # shall I avoid expanding CNAMEs (violates protocols)? _OPTION(DontExpandCnames, `confDONT_EXPAND_CNAMES', `False') # SMTP initial login message (old $e macro) _OPTION(SmtpGreetingMessage, `confSMTP_LOGIN_MSG', `$j Sendmail $v ready at $b') # UNIX initial From header format (old $l macro) _OPTION(UnixFromLine, `confFROM_LINE', `From $g $d') # From: lines that have embedded newlines are unwrapped onto one line _OPTION(SingleLineFromHeader, `confSINGLE_LINE_FROM_HEADER', `False') # Allow HELO SMTP command that does not `include' a host name _OPTION(AllowBogusHELO, `confALLOW_BOGUS_HELO', `False') # Characters to be quoted in a full name phrase (@,;:\()[] are automatic) _OPTION(MustQuoteChars, `confMUST_QUOTE_CHARS', `.') # delimiter (operator) characters (old $o macro) _OPTION(OperatorChars, `confOPERATORS', `.:@[]') # shall I avoid calling initgroups(3) because of high NIS costs? _OPTION(DontInitGroups, `confDONT_INIT_GROUPS', `False') # are group-writable `:include:' and .forward files (un)trustworthy? # True (the default) means they are not trustworthy. _OPTION(UnsafeGroupWrites, `confUNSAFE_GROUP_WRITES', `True') ifdef(`confUNSAFE_GROUP_WRITES', `errprint(`WARNING: confUNSAFE_GROUP_WRITES is deprecated; use confDONT_BLAME_SENDMAIL. ')') # where do errors that occur when sending errors get sent? _OPTION(DoubleBounceAddress, `confDOUBLE_BOUNCE_ADDRESS', `postmaster') # issue temporary errors (4xy) instead of permanent errors (5xy)? _OPTION(SoftBounce, `confSOFT_BOUNCE', `False') # where to save bounces if all else fails _OPTION(DeadLetterDrop, `confDEAD_LETTER_DROP', `/var/tmp/dead.letter') # what user id do we assume for the majority of the processing? _OPTION(RunAsUser, `confRUN_AS_USER', `sendmail') # maximum number of recipients per SMTP envelope _OPTION(MaxRecipientsPerMessage, `confMAX_RCPTS_PER_MESSAGE', `0') # limit the rate recipients per SMTP envelope are accepted # once the threshold number of recipients have been rejected _OPTION(BadRcptThrottle, `confBAD_RCPT_THROTTLE', `0') # shall we get local names from our installed interfaces? _OPTION(DontProbeInterfaces, `confDONT_PROBE_INTERFACES', `False') # Return-Receipt-To: header implies DSN request _OPTION(RrtImpliesDsn, `confRRT_IMPLIES_DSN', `False') # override connection address (for testing) _OPTION(ConnectOnlyTo, `confCONNECT_ONLY_TO', `0.0.0.0') # Trusted user for file ownership and starting the daemon _OPTION(TrustedUser, `confTRUSTED_USER', `root') # Control socket for daemon management _OPTION(ControlSocketName, `confCONTROL_SOCKET_NAME', `/var/spool/mqueue/.control') # Maximum MIME header length to protect MUAs _OPTION(MaxMimeHeaderLength, `confMAX_MIME_HEADER_LENGTH', `2048/1024') # Maximum length of the sum of all headers _OPTION(MaxHeadersLength, `confMAX_HEADERS_LENGTH', `32768') # Maximum depth of alias recursion _OPTION(MaxAliasRecursion, `confMAX_ALIAS_RECURSION', `10') # location of pid file _OPTION(PidFile, `confPID_FILE', `/var/run/sendmail.pid') # Prefix string for the process title shown on 'ps' listings _OPTION(ProcessTitlePrefix, `confPROCESS_TITLE_PREFIX', `prefix') # Data file (df) memory-buffer file maximum size _OPTION(DataFileBufferSize, `confDF_BUFFER_SIZE', `4096') # Transcript file (xf) memory-buffer file maximum size _OPTION(XscriptFileBufferSize, `confXF_BUFFER_SIZE', `4096') # lookup type to find information about local mailboxes _OPTION(MailboxDatabase, `confMAILBOX_DATABASE', `pw') # override compile time flag REQUIRES_DIR_FSYNC _OPTION(RequiresDirfsync, `confREQUIRES_DIR_FSYNC', `true') # list of authentication mechanisms _OPTION(AuthMechanisms, `confAUTH_MECHANISMS', `EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5') # Authentication realm _OPTION(AuthRealm, `confAUTH_REALM', `') # default authentication information for outgoing connections _OPTION(DefaultAuthInfo, `confDEF_AUTH_INFO', `MAIL_SETTINGS_DIR`'default-auth-info') # SMTP AUTH flags _OPTION(AuthOptions, `confAUTH_OPTIONS', `') # SMTP AUTH maximum encryption strength _OPTION(AuthMaxBits, `confAUTH_MAX_BITS', `') # SMTP STARTTLS server options _OPTION(TLSSrvOptions, `confTLS_SRV_OPTIONS', `') # Input mail filters _OPTION(InputMailFilters, `confINPUT_MAIL_FILTERS', `') ifelse(len(X`'_MAIL_FILTERS_DEF), `1', `dnl', `dnl # Milter options _OPTION(Milter.LogLevel, `confMILTER_LOG_LEVEL', `') _OPTION(Milter.macros.connect, `confMILTER_MACROS_CONNECT', `') _OPTION(Milter.macros.helo, `confMILTER_MACROS_HELO', `') _OPTION(Milter.macros.envfrom, `confMILTER_MACROS_ENVFROM', `') _OPTION(Milter.macros.envrcpt, `confMILTER_MACROS_ENVRCPT', `') _OPTION(Milter.macros.eom, `confMILTER_MACROS_EOM', `') _OPTION(Milter.macros.eoh, `confMILTER_MACROS_EOH', `') _OPTION(Milter.macros.data, `confMILTER_MACROS_DATA', `')') # CA directory _OPTION(CACertPath, `confCACERT_PATH', `') # CA file _OPTION(CACertFile, `confCACERT', `') # Server Cert _OPTION(ServerCertFile, `confSERVER_CERT', `') # Server private key _OPTION(ServerKeyFile, `confSERVER_KEY', `') # Client Cert _OPTION(ClientCertFile, `confCLIENT_CERT', `') # Client private key _OPTION(ClientKeyFile, `confCLIENT_KEY', `') # File containing certificate revocation lists _OPTION(CRLFile, `confCRL', `') # DHParameters (only required if DSA/DH is used) _OPTION(DHParameters, `confDH_PARAMETERS', `') # Random data source (required for systems without /dev/urandom under OpenSSL) _OPTION(RandFile, `confRAND_FILE', `') # Maximum number of "useless" commands before slowing down _OPTION(MaxNOOPCommands, `confMAX_NOOP_COMMANDS', `20') # Name to use for EHLO (defaults to $j) _OPTION(HeloName, `confHELO_NAME') ############################ `# QUEUE GROUP DEFINITIONS #' ############################ _QUEUE_GROUP_ ########################### # Message precedences # ########################### Pfirst-class=0 Pspecial-delivery=100 Plist=-30 Pbulk=-60 Pjunk=-100 ##################### # Trusted users # ##################### # this is equivalent to setting class "t" ifdef(`_USE_CT_FILE_', `', `#')Ft`'ifdef(`confCT_FILE', confCT_FILE, `MAIL_SETTINGS_DIR`'trusted-users') Troot Tdaemon ifdef(`_NO_UUCP_', `dnl', `Tuucp') ifdef(`confTRUSTED_USERS', `T`'confTRUSTED_USERS', `dnl') ######################### # Format of headers # ######################### ifdef(`confFROM_HEADER',, `define(`confFROM_HEADER', `$?x$x <$g>$|$g$.')')dnl ifdef(`confMESSAGEID_HEADER',, `define(`confMESSAGEID_HEADER', `<$t.$i@$j>')')dnl H?P?Return-Path: <$g> HReceived: confRECEIVED_HEADER H?D?Resent-Date: $a H?D?Date: $a H?F?Resent-From: confFROM_HEADER H?F?From: confFROM_HEADER H?x?Full-Name: $x # HPosted-Date: $a # H?l?Received-Date: $b H?M?Resent-Message-Id: confMESSAGEID_HEADER H?M?Message-Id: confMESSAGEID_HEADER # ###################################################################### ###################################################################### ##### ##### REWRITING RULES ##### ###################################################################### ###################################################################### ############################################ ### Ruleset 3 -- Name Canonicalization ### ############################################ Scanonify=3 # handle null input (translate to <@> special case) R$@ $@ <@> # strip group: syntax (not inside angle brackets!) and trailing semicolon R$* $: $1 <@> mark addresses R$* < $* > $* <@> $: $1 < $2 > $3 unmark R@ $* <@> $: @ $1 unmark @host:... R$* [ IPv6 : $+ ] <@> $: $1 [ IPv6 : $2 ] unmark IPv6 addr R$* :: $* <@> $: $1 :: $2 unmark node::addr R:`include': $* <@> $: :`include': $1 unmark :`include':... R$* : $* [ $* ] $: $1 : $2 [ $3 ] <@> remark if leading colon R$* : $* <@> $: $2 strip colon if marked R$* <@> $: $1 unmark R$* ; $1 strip trailing semi R$* < $+ :; > $* $@ $2 :; <@> catch R$* < $* ; > $1 < $2 > bogus bracketed semi # null input now results from list:; syntax R$@ $@ :; <@> # strip angle brackets -- note RFC733 heuristic to get innermost item R$* $: < $1 > housekeeping <> R$+ < $* > < $2 > strip excess on left R< $* > $+ < $1 > strip excess on right R<> $@ < @ > MAIL FROM:<> case R< $+ > $: $1 remove housekeeping <> ifdef(`_USE_DEPRECATED_ROUTE_ADDR_',`dnl # make sure <@a,@b,@c:user@d> syntax is easy to parse -- undone later R@ $+ , $+ @ $1 : $2 change all "," to ":" # localize and dispose of route-based addresses dnl XXX: IPv6 colon conflict ifdef(`NO_NETINET6', `dnl', `R@ [$+] : $+ $@ $>Canonify2 < @ [$1] > : $2 handle ') R@ $+ : $+ $@ $>Canonify2 < @$1 > : $2 handle dnl',`dnl # strip route address <@a,@b,@c:user@d> -> R@ $+ , $+ $2 ifdef(`NO_NETINET6', `dnl', `R@ [ $* ] : $+ $2') R@ $+ : $+ $2 dnl') # find focus for list syntax R $+ : $* ; @ $+ $@ $>Canonify2 $1 : $2 ; < @ $3 > list syntax R $+ : $* ; $@ $1 : $2; list syntax # find focus for @ syntax addresses R$+ @ $+ $: $1 < @ $2 > focus on domain R$+ < $+ @ $+ > $1 $2 < @ $3 > move gaze right R$+ < @ $+ > $@ $>Canonify2 $1 < @ $2 > already canonical dnl This is flagged as an error in S0; no need to silently fix it here. dnl # do some sanity checking dnl R$* < @ $~[ $* : $* > $* $1 < @ $2 $3 > $4 nix colons in addrs ifdef(`_NO_UUCP_', `dnl', `# convert old-style addresses to a domain-based address R$- ! $+ $@ $>Canonify2 $2 < @ $1 .UUCP > resolve uucp names R$+ . $- ! $+ $@ $>Canonify2 $3 < @ $1 . $2 > domain uucps R$+ ! $+ $@ $>Canonify2 $2 < @ $1 .UUCP > uucp subdomains ') ifdef(`_USE_DECNET_SYNTAX_', `# convert node::user addresses into a domain-based address R$- :: $+ $@ $>Canonify2 $2 < @ $1 .DECNET > resolve DECnet names R$- . $- :: $+ $@ $>Canonify2 $3 < @ $1.$2 .DECNET > numeric DECnet addr ', `dnl') # if we have % signs, take the rightmost one R$* % $* $1 @ $2 First make them all @s. R$* @ $* @ $* $1 % $2 @ $3 Undo all but the last. R$* @ $* $@ $>Canonify2 $1 < @ $2 > Insert < > and finish # else we must be a local name R$* $@ $>Canonify2 $1 ################################################ ### Ruleset 96 -- bottom half of ruleset 3 ### ################################################ SCanonify2=96 # handle special cases for local names R$* < @ localhost > $* $: $1 < @ $j . > $2 no domain at all R$* < @ localhost . $m > $* $: $1 < @ $j . > $2 local domain ifdef(`_NO_UUCP_', `dnl', `R$* < @ localhost . UUCP > $* $: $1 < @ $j . > $2 .UUCP domain') # check for IPv4/IPv6 domain literal R$* < @ [ $+ ] > $* $: $1 < @@ [ $2 ] > $3 mark [addr] R$* < @@ $=w > $* $: $1 < @ $j . > $3 self-literal R$* < @@ $+ > $* $@ $1 < @ $2 > $3 canon IP addr ifdef(`_DOMAIN_TABLE_', `dnl # look up domains in the domain table R$* < @ $+ > $* $: $1 < @ $(domaintable $2 $) > $3', `dnl') undivert(2)dnl LOCAL_RULE_3 ifdef(`_BITDOMAIN_TABLE_', `dnl # handle BITNET mapping R$* < @ $+ .BITNET > $* $: $1 < @ $(bitdomain $2 $: $2.BITNET $) > $3', `dnl') ifdef(`_UUDOMAIN_TABLE_', `dnl # handle UUCP mapping R$* < @ $+ .UUCP > $* $: $1 < @ $(uudomain $2 $: $2.UUCP $) > $3', `dnl') ifdef(`_NO_UUCP_', `dnl', `ifdef(`UUCP_RELAY', `# pass UUCP addresses straight through R$* < @ $+ . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `# if really UUCP, handle it immediately ifdef(`_CLASS_U_', `R$* < @ $=U . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') ifdef(`_CLASS_V_', `R$* < @ $=V . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') ifdef(`_CLASS_W_', `R$* < @ $=W . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') ifdef(`_CLASS_X_', `R$* < @ $=X . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') ifdef(`_CLASS_Y_', `R$* < @ $=Y . UUCP > $* $@ $1 < @ $2 . UUCP . > $3', `dnl') ifdef(`_NO_CANONIFY_', `dnl', `dnl # try UUCP traffic as a local address R$* < @ $+ . UUCP > $* $: $1 < @ $[ $2 $] . UUCP . > $3 R$* < @ $+ . . UUCP . > $* $@ $1 < @ $2 . > $3') ')') # hostnames ending in class P are always canonical R$* < @ $* $=P > $* $: $1 < @ $2 $3 . > $4 dnl apply the next rule only for hostnames not in class P dnl this even works for phrases in class P since . is in class P dnl which daemon flags are set? R$* < @ $* $~P > $* $: $&{daemon_flags} $| $1 < @ $2 $3 > $4 dnl the other rules in this section only apply if the hostname dnl does not end in class P hence no further checks are done here dnl if this ever changes make sure the lookups are "protected" again! ifdef(`_NO_CANONIFY_', `dnl dnl do not canonify unless: dnl domain ends in class {Canonify} (this does not work if the intersection dnl with class P is non-empty) dnl or {daemon_flags} has c set # pass to name server to make hostname canonical if in class {Canonify} R$* $| $* < @ $* $={Canonify} > $* $: $2 < @ $[ $3 $4 $] > $5 # pass to name server to make hostname canonical if requested R$* c $* $| $* < @ $* > $* $: $3 < @ $[ $4 $] > $5 dnl trailing dot? -> do not apply _CANONIFY_HOSTS_ R$* $| $* < @ $+ . > $* $: $2 < @ $3 . > $4 # add a trailing dot to qualified hostnames so other rules will work R$* $| $* < @ $+.$+ > $* $: $2 < @ $3.$4 . > $5 ifdef(`_CANONIFY_HOSTS_', `dnl dnl this should only apply to unqualified hostnames dnl but if a valid character inside an unqualified hostname is an OperatorChar dnl then $- does not work. # lookup unqualified hostnames R$* $| $* < @ $* > $* $: $2 < @ $[ $3 $] > $4', `dnl')', `dnl dnl _NO_CANONIFY_ is not set: canonify unless: dnl {daemon_flags} contains CC (do not canonify) dnl but add a trailing dot to qualified hostnames so other rules will work dnl should we do this for every hostname: even unqualified? R$* CC $* $| $* < @ $+.$+ > $* $: $3 < @ $4.$5 . > $6 R$* CC $* $| $* $: $3 ifdef(`_FFR_NOCANONIFY_HEADERS', `dnl # do not canonify header addresses R$* $| $* < @ $* $~P > $* $: $&{addr_type} $| $2 < @ $3 $4 > $5 R$* h $* $| $* < @ $+.$+ > $* $: $3 < @ $4.$5 . > $6 R$* h $* $| $* $: $3', `dnl') # pass to name server to make hostname canonical R$* $| $* < @ $* > $* $: $2 < @ $[ $3 $] > $4') dnl remove {daemon_flags} for other cases R$* $| $* $: $2 # local host aliases and pseudo-domains are always canonical R$* < @ $=w > $* $: $1 < @ $2 . > $3 ifdef(`_MASQUERADE_ENTIRE_DOMAIN_', `R$* < @ $* $=M > $* $: $1 < @ $2 $3 . > $4', `R$* < @ $=M > $* $: $1 < @ $2 . > $3') ifdef(`_VIRTUSER_TABLE_', `dnl dnl virtual hosts are also canonical ifdef(`_VIRTUSER_ENTIRE_DOMAIN_', `R$* < @ $* $={VirtHost} > $* $: $1 < @ $2 $3 . > $4', `R$* < @ $={VirtHost} > $* $: $1 < @ $2 . > $3')', `dnl') ifdef(`_GENERICS_TABLE_', `dnl dnl hosts for genericstable are also canonical ifdef(`_GENERICS_ENTIRE_DOMAIN_', `R$* < @ $* $=G > $* $: $1 < @ $2 $3 . > $4', `R$* < @ $=G > $* $: $1 < @ $2 . > $3')', `dnl') dnl remove superfluous dots (maybe repeatedly) which may have been added dnl by one of the rules before R$* < @ $* . . > $* $1 < @ $2 . > $3 ################################################## ### Ruleset 4 -- Final Output Post-rewriting ### ################################################## Sfinal=4 R$+ :; <@> $@ $1 : handle R$* <@> $@ handle <> and list:; # strip trailing dot off possibly canonical name R$* < @ $+ . > $* $1 < @ $2 > $3 # eliminate internal code R$* < @ *LOCAL* > $* $1 < @ $j > $2 # externalize local domain info R$* < $+ > $* $1 $2 $3 defocus R@ $+ : @ $+ : $+ @ $1 , @ $2 : $3 canonical R@ $* $@ @ $1 ... and exit ifdef(`_NO_UUCP_', `dnl', `# UUCP must always be presented in old form R$+ @ $- . UUCP $2!$1 u@h.UUCP => h!u') ifdef(`_USE_DECNET_SYNTAX_', `# put DECnet back in :: form R$+ @ $+ . DECNET $2 :: $1 u@h.DECNET => h::u', `dnl') # delete duplicate local names R$+ % $=w @ $=w $1 @ $2 u%host@host => u@host ############################################################## ### Ruleset 97 -- recanonicalize and call ruleset zero ### ### (used for recursive calls) ### ############################################################## SRecurse=97 R$* $: $>canonify $1 R$* $@ $>parse $1 ###################################### ### Ruleset 0 -- Parse Address ### ###################################### Sparse=0 R$* $: $>Parse0 $1 initial parsing R<@> $#_LOCAL_ $: <@> special case error msgs R$* $: $>ParseLocal $1 handle local hacks R$* $: $>Parse1 $1 final parsing # # Parse0 -- do initial syntax checking and eliminate local addresses. # This should either return with the (possibly modified) input # or return with a #error mailer. It should not return with a # #mailer other than the #error mailer. # SParse0 R<@> $@ <@> special case error msgs R$* : $* ; <@> $#error $@ 5.1.3 $: "_CODE553 List:; syntax illegal for recipient addresses" R@ <@ $* > < @ $1 > catch "@@host" bogosity R<@ $+> $#error $@ 5.1.3 $: "_CODE553 User address required" R$+ <@> $#error $@ 5.1.3 $: "_CODE553 Hostname required" R$* $: <> $1 dnl allow tricks like [host1]:[host2] R<> $* < @ [ $* ] : $+ > $* $1 < @ [ $2 ] : $3 > $4 R<> $* < @ [ $* ] , $+ > $* $1 < @ [ $2 ] , $3 > $4 dnl but no a@[b]c R<> $* < @ [ $* ] $+ > $* $#error $@ 5.1.2 $: "_CODE553 Invalid address" R<> $* < @ [ $+ ] > $* $1 < @ [ $2 ] > $3 R<> $* <$* : $* > $* $#error $@ 5.1.3 $: "_CODE553 Colon illegal in host name part" R<> $* $1 R$* < @ . $* > $* $#error $@ 5.1.2 $: "_CODE553 Invalid host name" R$* < @ $* .. $* > $* $#error $@ 5.1.2 $: "_CODE553 Invalid host name" dnl no a@b@ R$* < @ $* @ > $* $#error $@ 5.1.2 $: "_CODE553 Invalid route address" dnl no a@b@c R$* @ $* < @ $* > $* $#error $@ 5.1.3 $: "_CODE553 Invalid route address" dnl comma only allowed before @; this check is not complete R$* , $~O $* $#error $@ 5.1.3 $: "_CODE553 Invalid route address" ifdef(`_STRICT_RFC821_', `# more RFC 821 checks R$* . < @ $* > $* $#error $@ 5.1.2 $: "_CODE553 Local part must not end with a dot" R. $* < @ $* > $* $#error $@ 5.1.2 $: "_CODE553 Local part must not begin with a dot" dnl', `dnl') # now delete the local info -- note $=O to find characters that cause forwarding R$* < @ > $* $@ $>Parse0 $>canonify $1 user@ => user R< @ $=w . > : $* $@ $>Parse0 $>canonify $2 @here:... -> ... R$- < @ $=w . > $: $(dequote $1 $) < @ $2 . > dequote "foo"@here R< @ $+ > $#error $@ 5.1.3 $: "_CODE553 User address required" R$* $=O $* < @ $=w . > $@ $>Parse0 $>canonify $1 $2 $3 ...@here -> ... R$- $: $(dequote $1 $) < @ *LOCAL* > dequote "foo" R< @ *LOCAL* > $#error $@ 5.1.3 $: "_CODE553 User address required" R$* $=O $* < @ *LOCAL* > $@ $>Parse0 $>canonify $1 $2 $3 ...@*LOCAL* -> ... R$* < @ *LOCAL* > $: $1 # # Parse1 -- the bottom half of ruleset 0. # SParse1 ifdef(`_LDAP_ROUTING_', `dnl # handle LDAP routing for hosts in $={LDAPRoute} R$+ < @ $={LDAPRoute} . > $: $>LDAPExpand <$1 < @ $2 . >> <$1 @ $2> <> R$+ < @ $={LDAPRouteEquiv} . > $: $>LDAPExpand <$1 < @ $2 . >> <$1 @ $M> <>', `dnl') ifdef(`_MAILER_smtp_', `# handle numeric address spec dnl there is no check whether this is really an IP number R$* < @ [ $+ ] > $* $: $>ParseLocal $1 < @ [ $2 ] > $3 numeric internet spec R$* < @ [ $+ ] > $* $: $1 < @ [ $2 ] : $S > $3 Add smart host to path R$* < @ [ $+ ] : > $* $#_SMTP_ $@ [$2] $: $1 < @ [$2] > $3 no smarthost: send R$* < @ [ $+ ] : $- : $*> $* $#$3 $@ $4 $: $1 < @ [$2] > $5 smarthost with mailer R$* < @ [ $+ ] : $+ > $* $#_SMTP_ $@ $3 $: $1 < @ [$2] > $4 smarthost without mailer', `dnl') ifdef(`_VIRTUSER_TABLE_', `dnl # handle virtual users ifdef(`_VIRTUSER_STOP_ONE_LEVEL_RECURSION_',`dnl dnl this is not a documented option dnl it stops looping in virtusertable mapping if input and output dnl are identical, i.e., if address A is mapped to A. dnl it does not deal with multi-level recursion # handle full domains in RHS of virtusertable R$+ < @ $+ > $: $(macro {RecipientAddress} $) $1 < @ $2 > R$+ < @ $+ > $: $1 < @ $2 > $| $>final $1 < @ $2 > R $+ $| $+ $: $1 $(macro {RecipientAddress} $@ $2 $) R $+ $| $* $: $1', `dnl') R$+ $: $1 Mark for lookup dnl input: local<@domain> ifdef(`_VIRTUSER_ENTIRE_DOMAIN_', `R $+ < @ $* $={VirtHost} . > $: < $(virtuser $1 @ $2 $3 $@ $1 $: @ $) > $1 < @ $2 $3 . >', `R $+ < @ $={VirtHost} . > $: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . >') dnl input: local<@domain> | local<@domain> R $+ < @ $=w . > $: < $(virtuser $1 @ $2 $@ $1 $: @ $) > $1 < @ $2 . > dnl if <@> local<@domain>: no match but try lookup dnl user+detail: try user++@domain if detail not empty R<@> $+ + $+ < @ $* . > $: < $(virtuser $1 + + @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . > dnl user+detail: try user+*@domain R<@> $+ + $* < @ $* . > $: < $(virtuser $1 + * @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . > dnl user+detail: try user@domain R<@> $+ + $* < @ $* . > $: < $(virtuser $1 @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . > dnl try default entry: @domain dnl ++@domain R<@> $+ + $+ < @ $+ . > $: < $(virtuser + + @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . > dnl +*@domain R<@> $+ + $* < @ $+ . > $: < $(virtuser + * @ $3 $@ $1 $@ $2 $@ +$2 $: @ $) > $1 + $2 < @ $3 . > dnl @domain if +detail exists dnl if no match, change marker to prevent a second @domain lookup R<@> $+ + $* < @ $+ . > $: < $(virtuser @ $3 $@ $1 $@ $2 $@ +$2 $: ! $) > $1 + $2 < @ $3 . > dnl without +detail R<@> $+ < @ $+ . > $: < $(virtuser @ $2 $@ $1 $: @ $) > $1 < @ $2 . > dnl no match R<@> $+ $: $1 dnl remove mark R $+ $: $1 R< error : $-.$-.$- : $+ > $* $#error $@ $1.$2.$3 $: $4 R< error : $- $+ > $* $#error $@ $(dequote $1 $) $: $2 ifdef(`_VIRTUSER_STOP_ONE_LEVEL_RECURSION_',`dnl # check virtuser input address against output address, if same, skip recursion R< $+ > $+ < @ $+ > $: < $1 > $2 < @ $3 > $| $1 # it is the same: stop now R< $+ > $+ < @ $+ > $| $&{RecipientAddress} $: $>ParseLocal $>Parse0 $>canonify $1 R< $+ > $+ < @ $+ > $| $* $: < $1 > $2 < @ $3 > dnl', `dnl') dnl this is not a documented option dnl it performs no looping at all for virtusertable ifdef(`_NO_VIRTUSER_RECURSION_', `R< $+ > $+ < @ $+ > $: $>ParseLocal $>Parse0 $>canonify $1', `R< $+ > $+ < @ $+ > $: $>Recurse $1') dnl', `dnl') # short circuit local delivery so forwarded email works ifdef(`_MAILER_usenet_', `dnl R$+ . USENET < @ $=w . > $#usenet $@ usenet $: $1 handle usenet specially', `dnl') ifdef(`_STICKY_LOCAL_DOMAIN_', `R$+ < @ $=w . > $: < $H > $1 < @ $2 . > first try hub R< $+ > $+ < $+ > $>MailerToTriple < $1 > $2 < $3 > yep .... dnl $H empty (but @$=w.) R< > $+ + $* < $+ > $#_LOCAL_ $: $1 + $2 plussed name? R< > $+ < $+ > $#_LOCAL_ $: @ $1 nope, local address', `R$=L < @ $=w . > $#_LOCAL_ $: @ $1 special local names R$+ < @ $=w . > $#_LOCAL_ $: $1 regular local name') ifdef(`_MAILER_TABLE_', `dnl # not local -- try mailer table lookup R$* <@ $+ > $* $: < $2 > $1 < @ $2 > $3 extract host name R< $+ . > $* $: < $1 > $2 strip trailing dot R< $+ > $* $: < $(mailertable $1 $) > $2 lookup dnl it is $~[ instead of $- to avoid matches on IPv6 addresses R< $~[ : $* > $* $>MailerToTriple < $1 : $2 > $3 check -- resolved? R< $+ > $* $: $>Mailertable <$1> $2 try domain', `dnl') undivert(4)dnl UUCP rules from `MAILER(uucp)' ifdef(`_NO_UUCP_', `dnl', `# resolve remotely connected UUCP links (if any) ifdef(`_CLASS_V_', `R$* < @ $=V . UUCP . > $* $: $>MailerToTriple < $V > $1 <@$2.UUCP.> $3', `dnl') ifdef(`_CLASS_W_', `R$* < @ $=W . UUCP . > $* $: $>MailerToTriple < $W > $1 <@$2.UUCP.> $3', `dnl') ifdef(`_CLASS_X_', `R$* < @ $=X . UUCP . > $* $: $>MailerToTriple < $X > $1 <@$2.UUCP.> $3', `dnl')') # resolve fake top level domains by forwarding to other hosts ifdef(`BITNET_RELAY', `R$*<@$+.BITNET.>$* $: $>MailerToTriple < $B > $1 <@$2.BITNET.> $3 user@host.BITNET', `dnl') ifdef(`DECNET_RELAY', `R$*<@$+.DECNET.>$* $: $>MailerToTriple < $C > $1 <@$2.DECNET.> $3 user@host.DECNET', `dnl') ifdef(`_MAILER_pop_', `R$+ < @ POP. > $#pop $: $1 user@POP', `dnl') ifdef(`_MAILER_fax_', `R$+ < @ $+ .FAX. > $#fax $@ $2 $: $1 user@host.FAX', `ifdef(`FAX_RELAY', `R$*<@$+.FAX.>$* $: $>MailerToTriple < $F > $1 <@$2.FAX.> $3 user@host.FAX', `dnl')') ifdef(`UUCP_RELAY', `# forward non-local UUCP traffic to our UUCP relay R$*<@$*.UUCP.>$* $: $>MailerToTriple < $Y > $1 <@$2.UUCP.> $3 uucp mail', `ifdef(`_MAILER_uucp_', `# forward other UUCP traffic straight to UUCP R$* < @ $+ .UUCP. > $* $#_UUCP_ $@ $2 $: $1 < @ $2 .UUCP. > $3 user@host.UUCP', `dnl')') ifdef(`_MAILER_usenet_', ` # addresses sent to net.group.USENET will get forwarded to a newsgroup R$+ . USENET $#usenet $@ usenet $: $1', `dnl') ifdef(`_LOCAL_RULES_', `# figure out what should stay in our local mail system undivert(1)', `dnl') # pass names that still have a host to a smarthost (if defined) R$* < @ $* > $* $: $>MailerToTriple < $S > $1 < @ $2 > $3 glue on smarthost name # deal with other remote names ifdef(`_MAILER_smtp_', `R$* < @$* > $* $#_SMTP_ $@ $2 $: $1 < @ $2 > $3 user@host.domain', `R$* < @$* > $* $#error $@ 5.1.2 $: "_CODE553 Unrecognized host name " $2') # handle locally delivered names R$=L $#_LOCAL_ $: @ $1 special local names R$+ $#_LOCAL_ $: $1 regular local names ########################################################################### ### Ruleset 5 -- special rewriting after aliases have been expanded ### ########################################################################### SLocal_localaddr Slocaladdr=5 R$+ $: $1 $| $>"Local_localaddr" $1 R$+ $| $#ok $@ $1 no change R$+ $| $#$* $#$2 R$+ $| $* $: $1 ifdef(`_PRESERVE_LUSER_HOST_', `dnl # Preserve rcpt_host in {Host} R$+ $: $1 $| $&h $| $&{Host} check h and {Host} R$+ $| $| $: $(macro {Host} $@ $) $1 no h or {Host} R$+ $| $| $+ $: $1 h not set, {Host} set R$+ $| +$* $| $* $: $1 h is +detail, {Host} set R$+ $| $* @ $+ $| $* $: $(macro {Host} $@ @$3 $) $1 set {Host} to host in h R$+ $| $+ $| $* $: $(macro {Host} $@ @$2 $) $1 set {Host} to h ')dnl ifdef(`_FFR_5_', `dnl # Preserve host in a macro R$+ $: $(macro {LocalAddrHost} $) $1 R$+ @ $+ $: $(macro {LocalAddrHost} $@ @ $2 $) $1') ifdef(`_PRESERVE_LOCAL_PLUS_DETAIL_', `', `dnl # deal with plussed users so aliases work nicely R$+ + * $#_LOCAL_ $@ $&h $: $1`'ifdef(`_FFR_5_', ` $&{LocalAddrHost}') R$+ + $* $#_LOCAL_ $@ + $2 $: $1 + *`'ifdef(`_FFR_5_', ` $&{LocalAddrHost}') ') # prepend an empty "forward host" on the front R$+ $: <> $1 ifdef(`LUSER_RELAY', `dnl # send unrecognized local users to a relay host ifdef(`_PRESERVE_LOCAL_PLUS_DETAIL_', `dnl R< > $+ + $* $: < ? $L > <+ $2> $(user $1 $) look up user+ R< > $+ $: < ? $L > < > $(user $1 $) look up user R< ? $* > < $* > $+ <> $: < > $3 $2 found; strip $L R< ? $* > < $* > $+ $: < $1 > $3 $2 not found', ` R< > $+ $: < $L > $(user $1 $) look up user R< $* > $+ <> $: < > $2 found; strip $L') ifdef(`_PRESERVE_LUSER_HOST_', `dnl R< $+ > $+ $: < $1 > $2 $&{Host}') dnl') ifdef(`MAIL_HUB', `dnl R< > $+ $: < $H > $1 try hub', `dnl') ifdef(`LOCAL_RELAY', `dnl R< > $+ $: < $R > $1 try relay', `dnl') ifdef(`_PRESERVE_LOCAL_PLUS_DETAIL_', `dnl R< > $+ $@ $1', `dnl R< > $+ $: < > < $1 <> $&h > nope, restore +detail ifdef(`_PRESERVE_LUSER_HOST_', `dnl R< > < $+ @ $+ <> + $* > $: < > < $1 + $3 @ $2 > check whether +detail') R< > < $+ <> + $* > $: < > < $1 + $2 > check whether +detail R< > < $+ <> $* > $: < > < $1 > else discard R< > < $+ + $* > $* < > < $1 > + $2 $3 find the user part R< > < $+ > + $* $#_LOCAL_ $@ $2 $: @ $1`'ifdef(`_FFR_5_', ` $&{LocalAddrHost}') strip the extra + R< > < $+ > $@ $1 no +detail R$+ $: $1 <> $&h add +detail back in ifdef(`_PRESERVE_LUSER_HOST_', `dnl R$+ @ $+ <> + $* $: $1 + $3 @ $2 check whether +detail') R$+ <> + $* $: $1 + $2 check whether +detail R$+ <> $* $: $1 else discard') R< local : $* > $* $: $>MailerToTriple < local : $1 > $2 no host extension R< error : $* > $* $: $>MailerToTriple < error : $1 > $2 no host extension ifdef(`_PRESERVE_LUSER_HOST_', `dnl dnl it is $~[ instead of $- to avoid matches on IPv6 addresses R< $~[ : $+ > $+ @ $+ $: $>MailerToTriple < $1 : $2 > $3 < @ $4 >') R< $~[ : $+ > $+ $: $>MailerToTriple < $1 : $2 > $3 < @ $2 > ifdef(`_PRESERVE_LUSER_HOST_', `dnl R< $+ > $+ @ $+ $@ $>MailerToTriple < $1 > $2 < @ $3 >') R< $+ > $+ $@ $>MailerToTriple < $1 > $2 < @ $1 > ifdef(`_MAILER_TABLE_', `dnl ifdef(`_LDAP_ROUTING_', `dnl ################################################################### ### Ruleset LDAPMailertable -- mailertable lookup for LDAP ### dnl input: FullAddress ################################################################### SLDAPMailertable R< $+ > $* $: < $(mailertable $1 $) > $2 lookup R< $~[ : $* > $* $>MailerToTriple < $1 : $2 > $3 check resolved? R< $+ > $* $: < $1 > $>Mailertable <$1> $2 try domain R< $+ > $#$* $#$2 found R< $+ > $* $#_RELAY_ $@ $1 $: $2 not found, direct relay', `dnl') ################################################################### ### Ruleset 90 -- try domain part of mailertable entry ### dnl input: LeftPartOfDomain FullAddress ################################################################### SMailertable=90 dnl shift and check dnl %2 is not documented in cf/README R$* <$- . $+ > $* $: $1$2 < $(mailertable .$3 $@ $1$2 $@ $2 $) > $4 dnl it is $~[ instead of $- to avoid matches on IPv6 addresses R$* <$~[ : $* > $* $>MailerToTriple < $2 : $3 > $4 check -- resolved? R$* < . $+ > $* $@ $>Mailertable $1 . <$2> $3 no -- strip & try again dnl is $2 always empty? R$* < $* > $* $: < $(mailertable . $@ $1$2 $) > $3 try "." R< $~[ : $* > $* $>MailerToTriple < $1 : $2 > $3 "." found? dnl return full address R< $* > $* $@ $2 no mailertable match', `dnl') ################################################################### ### Ruleset 95 -- canonify mailer:[user@]host syntax to triple ### dnl input: in general: <[mailer:]host> lp<@domain>rest dnl <> address -> address dnl -> error dnl -> error dnl -> error dnl lp<@domain>rest -> mailer host user dnl address -> mailer host address dnl address -> address dnl address -> relay host address ################################################################### SMailerToTriple=95 R< > $* $@ $1 strip off null relay R< error : $-.$-.$- : $+ > $* $#error $@ $1.$2.$3 $: $4 R< error : $- : $+ > $* $#error $@ $(dequote $1 $) $: $2 R< error : $+ > $* $#error $: $1 R< local : $* > $* $>CanonLocal < $1 > $2 dnl it is $~[ instead of $- to avoid matches on IPv6 addresses R< $~[ : $+ @ $+ > $*<$*>$* $# $1 $@ $3 $: $2<@$3> use literal user R< $~[ : $+ > $* $# $1 $@ $2 $: $3 try qualified mailer R< $=w > $* $@ $2 delete local host R< $+ > $* $#_RELAY_ $@ $1 $: $2 use unqualified mailer ################################################################### ### Ruleset CanonLocal -- canonify local: syntax ### dnl input: address dnl <@host> : rest -> Recurse rest dnl p1 $=O p2 <@host> -> Recurse p1 $=O p2 dnl <> user <@host> rest -> local user@host user dnl <> user -> local user user dnl lp <@domain> rest -> lp <@host> [cont] dnl lp <@host> rest -> local lp@host user dnl lp -> local lp user ################################################################### SCanonLocal # strip local host from routed addresses R< $* > < @ $+ > : $+ $@ $>Recurse $3 R< $* > $+ $=O $+ < @ $+ > $@ $>Recurse $2 $3 $4 # strip trailing dot from any host name that may appear R< $* > $* < @ $* . > $: < $1 > $2 < @ $3 > # handle local: syntax -- use old user, either with or without host R< > $* < @ $* > $* $#_LOCAL_ $@ $1@$2 $: $1 R< > $+ $#_LOCAL_ $@ $1 $: $1 # handle local:user@host syntax -- ignore host part R< $+ @ $+ > $* < @ $* > $: < $1 > $3 < @ $4 > # handle local:user syntax R< $+ > $* <@ $* > $* $#_LOCAL_ $@ $2@$3 $: $1 R< $+ > $* $#_LOCAL_ $@ $2 $: $1 ################################################################### ### Ruleset 93 -- convert header names to masqueraded form ### ################################################################### SMasqHdr=93 ifdef(`_GENERICS_TABLE_', `dnl # handle generics database ifdef(`_GENERICS_ENTIRE_DOMAIN_', dnl if generics should be applied add a @ as mark `R$+ < @ $* $=G . > $: < $1@$2$3 > $1 < @ $2$3 . > @ mark', `R$+ < @ $=G . > $: < $1@$2 > $1 < @ $2 . > @ mark') R$+ < @ *LOCAL* > $: < $1@$j > $1 < @ *LOCAL* > @ mark dnl workspace: either user<@domain> or user <@domain> @ dnl ignore the first case for now dnl if it has the mark lookup full address dnl broken: %1 is full address not just detail R< $+ > $+ < $* > @ $: < $(generics $1 $: @ $1 $) > $2 < $3 > dnl workspace: ... or user <@domain> dnl no match, try user+detail@domain R<@$+ + $* @ $+> $+ < @ $+ > $: < $(generics $1+*@$3 $@ $2 $:@$1 + $2@$3 $) > $4 < @ $5 > R<@$+ + $* @ $+> $+ < @ $+ > $: < $(generics $1@$3 $: $) > $4 < @ $5 > dnl no match, remove mark R<@$+ > $+ < @ $+ > $: < > $2 < @ $3 > dnl no match, try @domain for exceptions R< > $+ < @ $+ . > $: < $(generics @$2 $@ $1 $: $) > $1 < @ $2 . > dnl workspace: ... or user <@domain> dnl no match, try local part R< > $+ < @ $+ > $: < $(generics $1 $: $) > $1 < @ $2 > R< > $+ + $* < @ $+ > $: < $(generics $1+* $@ $2 $: $) > $1 + $2 < @ $3 > R< > $+ + $* < @ $+ > $: < $(generics $1 $: $) > $1 + $2 < @ $3 > R< $* @ $* > $* < $* > $@ $>canonify $1 @ $2 found qualified R< $+ > $* < $* > $: $>canonify $1 @ *LOCAL* found unqualified R< > $* $: $1 not found', `dnl') # do not masquerade anything in class N R$* < @ $* $=N . > $@ $1 < @ $2 $3 . > ifdef(`MASQUERADE_NAME', `dnl # special case the users that should be exposed R$=E < @ *LOCAL* > $@ $1 < @ $j . > leave exposed ifdef(`_MASQUERADE_ENTIRE_DOMAIN_', `R$=E < @ $* $=M . > $@ $1 < @ $2 $3 . >', `R$=E < @ $=M . > $@ $1 < @ $2 . >') ifdef(`_LIMITED_MASQUERADE_', `dnl', `R$=E < @ $=w . > $@ $1 < @ $2 . >') # handle domain-specific masquerading ifdef(`_MASQUERADE_ENTIRE_DOMAIN_', `R$* < @ $* $=M . > $* $: $1 < @ $2 $3 . @ $M > $4 convert masqueraded doms', `R$* < @ $=M . > $* $: $1 < @ $2 . @ $M > $3 convert masqueraded doms') ifdef(`_LIMITED_MASQUERADE_', `dnl', `R$* < @ $=w . > $* $: $1 < @ $2 . @ $M > $3') R$* < @ *LOCAL* > $* $: $1 < @ $j . @ $M > $2 R$* < @ $+ @ > $* $: $1 < @ $2 > $3 $M is null R$* < @ $+ @ $+ > $* $: $1 < @ $3 . > $4 $M is not null dnl', `dnl no masquerading dnl just fix *LOCAL* leftovers R$* < @ *LOCAL* > $@ $1 < @ $j . >') ################################################################### ### Ruleset 94 -- convert envelope names to masqueraded form ### ################################################################### SMasqEnv=94 ifdef(`_MASQUERADE_ENVELOPE_', `R$+ $@ $>MasqHdr $1', `R$* < @ *LOCAL* > $* $: $1 < @ $j . > $2') ################################################################### ### Ruleset 98 -- local part of ruleset zero (can be null) ### ################################################################### SParseLocal=98 undivert(3)dnl LOCAL_RULE_0 ifdef(`_LDAP_ROUTING_', `dnl ###################################################################### ### LDAPExpand: Expand address using LDAP routing ### ### Parameters: ### <$1> -- parsed address (user < @ domain . >) (pass through) ### <$2> -- RFC822 address (user @ domain) (used for lookup) ### <$3> -- +detail information ### ### Returns: ### Mailer triplet ($#mailer $@ host $: address) ### Parsed address (user < @ domain . >) ###################################################################### # SMTP operation modes C{SMTPOpModes} s d D SLDAPExpand # do the LDAP lookups R<$+><$+><$*> $: <$(ldapmra $2 $: $)> <$(ldapmh $2 $: $)> <$1> <$2> <$3> # look for temporary failures and... R<$* > <$*> <$+> <$+> <$*> $: $&{opMode} $| TMPF <$&{addr_type}> $| $3 R<$*> <$* > <$+> <$+> <$*> $: $&{opMode} $| TMPF <$&{addr_type}> $| $3 ifelse(_LDAP_ROUTE_MAPTEMP_, `_TEMPFAIL_', `dnl # ... temp fail RCPT SMTP commands R$={SMTPOpModes} $| TMPF $| $+ $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."') # ... return original address for MTA to queue up R$* $| TMPF <$*> $| $+ $@ $3 # if mailRoutingAddress and local or non-existant mailHost, # return the new mailRoutingAddress ifelse(_LDAP_ROUTE_DETAIL_, `_PRESERVE_', `dnl R<$+@$+> <$=w> <$+> <$+> <$*> $@ $>Parse0 $>canonify $1 $6 @ $2 R<$+@$+> <> <$+> <$+> <$*> $@ $>Parse0 $>canonify $1 $5 @ $2') R<$+> <$=w> <$+> <$+> <$*> $@ $>Parse0 $>canonify $1 R<$+> <> <$+> <$+> <$*> $@ $>Parse0 $>canonify $1 # if mailRoutingAddress and non-local mailHost, # relay to mailHost with new mailRoutingAddress ifelse(_LDAP_ROUTE_DETAIL_, `_PRESERVE_', `dnl ifdef(`_MAILER_TABLE_', `dnl # check mailertable for host, relay from there R<$+@$+> <$+> <$+> <$+> <$*> $>LDAPMailertable <$3> $>canonify $1 $6 @ $2', `R<$+@$+> <$+> <$+> <$+> <$*> $#_RELAY_ $@ $3 $: $>canonify $1 $6 @ $2')') ifdef(`_MAILER_TABLE_', `dnl # check mailertable for host, relay from there R<$+> <$+> <$+> <$+> <$*> $>LDAPMailertable <$2> $>canonify $1', `R<$+> <$+> <$+> <$+> <$*> $#_RELAY_ $@ $2 $: $>canonify $1') # if no mailRoutingAddress and local mailHost, # return original address R<> <$=w> <$+> <$+> <$*> $@ $2 # if no mailRoutingAddress and non-local mailHost, # relay to mailHost with original address ifdef(`_MAILER_TABLE_', `dnl # check mailertable for host, relay from there R<> <$+> <$+> <$+> <$*> $>LDAPMailertable <$1> $2', `R<> <$+> <$+> <$+> <$*> $#_RELAY_ $@ $1 $: $2') ifdef(`_LDAP_ROUTE_DETAIL_', `# if no mailRoutingAddress and no mailHost, # try without +detail R<> <> <$+> <$+ + $* @ $+> <> $@ $>LDAPExpand <$1> <$2 @ $4> <+$3>')dnl ifdef(`_LDAP_ROUTE_NODOMAIN_', ` # pretend we did the @domain lookup R<> <> <$+> <$+ @ $+> <$*> $: <> <> <$1> <@ $3> <$4>', ` # if still no mailRoutingAddress and no mailHost, # try @domain ifelse(_LDAP_ROUTE_DETAIL_, `_PRESERVE_', `dnl R<> <> <$+> <$+ + $* @ $+> <> $@ $>LDAPExpand <$1> <@ $4> <+$3>') R<> <> <$+> <$+ @ $+> <$*> $@ $>LDAPExpand <$1> <@ $3> <$4>') # if no mailRoutingAddress and no mailHost and this was a domain attempt, ifelse(_LDAP_ROUTING_, `_MUST_EXIST_', `dnl # user does not exist R<> <> <$+> <@ $+> <$*> $: < $&{addr_type} > < $1 > # only give error for envelope recipient R <$+> $#error $@ nouser $: "550 User unknown" ifdef(`_LDAP_SENDER_MUST_EXIST_', `dnl # and the sender too R <$+> $#error $@ nouser $: "550 User unknown"') R <$*> <$+> $@ $2', `dnl # return the original address R<> <> <$+> <@ $+> <$*> $@ $1')', `dnl') ifelse(substr(confDELIVERY_MODE,0,1), `d', `errprint(`WARNING: Antispam rules not available in deferred delivery mode. ')') ifdef(`_ACCESS_TABLE_', `dnl', `divert(-1)') ###################################################################### ### D: LookUpDomain -- search for domain in access database ### ### Parameters: ### <$1> -- key (domain name) ### <$2> -- default (what to return if not found in db) dnl must not be empty ### <$3> -- mark (must be <(!|+) single-token>) ### ! does lookup only with tag ### + does lookup with and without tag ### <$4> -- passthru (additional data passed unchanged through) dnl returns: dnl ###################################################################### SD dnl workspace dnl lookup with tag (in front, no delimiter here) dnl 2 3 4 5 R<$*> <$+> <$- $-> <$*> $: < $(access $4`'_TAG_DELIM_`'$1 $: ? $) > <$1> <$2> <$3 $4> <$5> dnl workspace dnl lookup without tag? dnl 1 2 3 4 R <$+> <$+> <+ $-> <$*> $: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4> ifdef(`_LOOKUPDOTDOMAIN_', `dnl omit first component: lookup .rest dnl XXX apply this also to IP addresses? dnl currently it works the wrong way round for [1.2.3.4] dnl 1 2 3 4 5 6 R <$+.$+> <$+> <$- $-> <$*> $: < $(access $5`'_TAG_DELIM_`'.$2 $: ? $) > <$1.$2> <$3> <$4 $5> <$6> dnl 1 2 3 4 5 R <$+.$+> <$+> <+ $-> <$*> $: < $(access .$2 $: ? $) > <$1.$2> <$3> <+ $4> <$5>', `dnl') ifdef(`_ACCESS_SKIP_', `dnl dnl found SKIP: return and dnl 1 2 3 4 5 R <$+> <$+> <$- $-> <$*> $@ <$2> <$5>', `dnl') dnl not found: IPv4 net (no check is done whether it is an IP number!) dnl 1 2 3 4 5 6 R <[$+.$-]> <$+> <$- $-> <$*> $@ $>D <[$1]> <$3> <$4 $5> <$6> ifdef(`NO_NETINET6', `dnl', `dnl not found: IPv6 net dnl (could be merged with previous rule if we have a class containing .:) dnl 1 2 3 4 5 6 R <[$+::$-]> <$+> <$- $-> <$*> $: $>D <[$1]> <$3> <$4 $5> <$6> R <[$+:$-]> <$+> <$- $-> <$*> $: $>D <[$1]> <$3> <$4 $5> <$6>') dnl not found, but subdomain: try again dnl 1 2 3 4 5 6 R <$+.$+> <$+> <$- $-> <$*> $@ $>D <$2> <$3> <$4 $5> <$6> ifdef(`_FFR_LOOKUPTAG_', `dnl lookup Tag: dnl 1 2 3 4 R <$+> <$+> <$*> $: < $(access $3`'_TAG_DELIM_ $: ? $) > <$1> <$2> <$4>', `dnl') dnl not found, no subdomain: return and dnl 1 2 3 4 5 R <$+> <$+> <$- $-> <$*> $@ <$2> <$5> ifdef(`_ATMPF_', `dnl tempfail? dnl 2 3 4 5 6 R<$* _ATMPF_> <$+> <$+> <$- $-> <$*> $@ <_ATMPF_> <$6>', `dnl') dnl return and dnl 2 3 4 5 6 R<$*> <$+> <$+> <$- $-> <$*> $@ <$1> <$6> ###################################################################### ### A: LookUpAddress -- search for host address in access database ### ### Parameters: ### <$1> -- key (dot quadded host address) ### <$2> -- default (what to return if not found in db) dnl must not be empty ### <$3> -- mark (must be <(!|+) single-token>) ### ! does lookup only with tag ### + does lookup with and without tag ### <$4> -- passthru (additional data passed through) dnl returns: dnl ###################################################################### SA dnl lookup with tag dnl 2 3 4 5 R<$+> <$+> <$- $-> <$*> $: < $(access $4`'_TAG_DELIM_`'$1 $: ? $) > <$1> <$2> <$3 $4> <$5> dnl lookup without tag dnl 1 2 3 4 R <$+> <$+> <+ $-> <$*> $: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4> dnl workspace ifdef(`_ACCESS_SKIP_', `dnl dnl found SKIP: return and dnl 1 2 3 4 5 R <$+> <$+> <$- $-> <$*> $@ <$2> <$5>', `dnl') ifdef(`NO_NETINET6', `dnl', `dnl no match; IPv6: remove last part dnl 1 2 3 4 5 6 R <$+::$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6> R <$+:$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6>') dnl no match; IPv4: remove last part dnl 1 2 3 4 5 6 R <$+.$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6> dnl no match: return default dnl 1 2 3 4 5 R <$+> <$+> <$- $-> <$*> $@ <$2> <$5> ifdef(`_ATMPF_', `dnl tempfail? dnl 2 3 4 5 6 R<$* _ATMPF_> <$+> <$+> <$- $-> <$*> $@ <_ATMPF_> <$6>', `dnl') dnl match: return result dnl 2 3 4 5 6 R<$*> <$+> <$+> <$- $-> <$*> $@ <$1> <$6> dnl endif _ACCESS_TABLE_ divert(0) ###################################################################### ### CanonAddr -- Convert an address into a standard form for ### relay checking. Route address syntax is ### crudely converted into a %-hack address. ### ### Parameters: ### $1 -- full recipient address ### ### Returns: ### parsed address, not in source route form dnl user%host%host<@domain> dnl host!user<@domain> ###################################################################### SCanonAddr R$* $: $>Parse0 $>canonify $1 make domain canonical ifdef(`_USE_DEPRECATED_ROUTE_ADDR_',`dnl R< @ $+ > : $* @ $* < @ $1 > : $2 % $3 change @ to % in src route R$* < @ $+ > : $* : $* $3 $1 < @ $2 > : $4 change to % hack. R$* < @ $+ > : $* $3 $1 < @ $2 > dnl') ###################################################################### ### ParseRecipient -- Strip off hosts in $=R as well as possibly ### $* $=m or the access database. ### Check user portion for host separators. ### ### Parameters: ### $1 -- full recipient address ### ### Returns: ### parsed, non-local-relaying address ###################################################################### SParseRecipient dnl mark and canonify address R$* $: $>CanonAddr $1 dnl workspace: localpart<@domain[.]> R $* < @ $* . > $1 < @ $2 > strip trailing dots dnl workspace: localpart<@domain> R $- < @ $* > $: $(dequote $1 $) < @ $2 > dequote local part # if no $=O character, no host in the user portion, we are done R $* $=O $* < @ $* > $: $1 $2 $3 < @ $4> dnl no $=O in localpart: return R $* $@ $1 dnl workspace: localpart<@domain>, where localpart contains $=O dnl mark everything which has an "authorized" domain with ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl # if we relay, check username portion for user%host so host can be checked also R $* < @ $* $=m > $: $1 < @ $2 $3 >', `dnl') dnl workspace: <(NO|RELAY)> localpart<@domain>, where localpart contains $=O dnl if mark is then change it to if domain is "authorized" dnl what if access map returns something else than RELAY? dnl we are only interested in RELAY entries... dnl other To: entries: blacklist recipient; generic entries? dnl if it is an error we probably do not want to relay anyway ifdef(`_RELAY_HOSTS_ONLY_', `R $* < @ $=R > $: $1 < @ $2 > ifdef(`_ACCESS_TABLE_', `dnl R $* < @ $+ > $: <$(access To:$2 $: NO $)> $1 < @ $2 > R $* < @ $+ > $: <$(access $2 $: NO $)> $1 < @ $2 >',`dnl')', `R $* < @ $* $=R > $: $1 < @ $2 $3 > ifdef(`_ACCESS_TABLE_', `dnl R $* < @ $+ > $: $>D <$2> <+ To> <$1 < @ $2 >> R<$+> <$+> $: <$1> $2',`dnl')') ifdef(`_RELAY_MX_SERVED_', `dnl dnl do "we" ($=w) act as backup MX server for the destination domain? R $* < @ $+ > $: < : $(mxserved $2 $) : > < $1 < @$2 > > R < : $* : > $* $#TEMP $@ 4.4.0 $: "450 Can not check MX records for recipient host " $1 dnl yes: mark it as R < $* : $=w. : $* > < $+ > $: $4 dnl no: put old mark back R < : $* : > < $+ > $: $2', `dnl') dnl do we relay to this recipient domain? R $* < @ $* > $@ $>ParseRecipient $1 dnl something else R<$+> $* $@ $2 ###################################################################### ### check_relay -- check hostname/address on SMTP startup ###################################################################### ifdef(`_CONTROL_IMMEDIATE_',`dnl Scheck_relay ifdef(`_RATE_CONTROL_IMMEDIATE_',`dnl dnl workspace: ignored... R$* $: $>"RateControl" dummy', `dnl') ifdef(`_CONN_CONTROL_IMMEDIATE_',`dnl dnl workspace: ignored... R$* $: $>"ConnControl" dummy', `dnl') dnl') SLocal_check_relay Scheck`'_U_`'relay ifdef(`_USE_CLIENT_PTR_',`dnl R$* $| $* $: $&{client_ptr} $| $2', `dnl') R$* $: $1 $| $>"Local_check_relay" $1 R$* $| $* $| $#$* $#$3 R$* $| $* $| $* $@ $>"Basic_check_relay" $1 $| $2 SBasic_check_relay # check for deferred delivery mode R$* $: < $&{deliveryMode} > $1 R< d > $* $@ deferred R< $* > $* $: $2 ifdef(`_ACCESS_TABLE_', `dnl dnl workspace: {client_name} $| {client_addr} R$+ $| $+ $: $>D < $1 > <+ Connect> < $2 > dnl workspace: <{client_addr}> dnl OR $| $+ if client_name is empty R $| $+ $: $>A < $1 > <+ Connect> <> empty client_name dnl workspace: <{client_addr}> R <$+> $: $>A < $1 > <+ Connect> <> no: another lookup dnl workspace: (<>|<{client_addr}>) R <$*> $: OK found nothing dnl workspace: (<>|<{client_addr}>) | OK R<$={Accept}> <$*> $@ $1 return value of lookup R <$*> $#error ifdef(`confREJECT_MSG', `$: confREJECT_MSG', `$@ 5.7.1 $: "550 Access denied"') R <$*> $#discard $: discard R <$*> $#error $@ quarantine $: $1 dnl error tag R <$*> $#error $@ $1.$2.$3 $: $4 R <$*> $#error $: $1 ifdef(`_ATMPF_', `R<$* _ATMPF_> <$*> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl generic error from access map R<$+> <$*> $#error $: $1', `dnl') ifdef(`_RBL_',`dnl # DNS based IP address spam list dnl workspace: ignored... R$* $: $&{client_addr} R$-.$-.$-.$- $: $(host $4.$3.$2.$1._RBL_. $: OK $) ROK $: OKSOFAR R$+ $#error $@ 5.7.1 $: "550 Rejected: " $&{client_addr} " listed at _RBL_"', `dnl') ifdef(`_RATE_CONTROL_',`dnl ifdef(`_RATE_CONTROL_IMMEDIATE_',`', `dnl dnl workspace: ignored... R$* $: $>"RateControl" dummy')', `dnl') ifdef(`_CONN_CONTROL_',`dnl ifdef(`_CONN_CONTROL_IMMEDIATE_',`',`dnl dnl workspace: ignored... R$* $: $>"ConnControl" dummy')', `dnl') undivert(8) ifdef(`_REQUIRE_RDNS_', `dnl R$* $: $&{client_addr} $| $&{client_resolve} R$=R $* $@ RELAY We relay for these R$* $| OK $@ OK Resolves. R$* $| FAIL $#error $@ 5.7.1 $: 550 Fix reverse DNS for $1 R$* $| TEMP $#error $@ 4.1.8 $: 451 Client IP address $1 does not resolve R$* $| FORGED $#error $@ 4.1.8 $: 451 Possibly forged hostname for $1 ', `dnl') ###################################################################### ### check_mail -- check SMTP ``MAIL FROM:'' command argument ###################################################################### SLocal_check_mail Scheck`'_U_`'mail R$* $: $1 $| $>"Local_check_mail" $1 R$* $| $#$* $#$2 R$* $| $* $@ $>"Basic_check_mail" $1 SBasic_check_mail # check for deferred delivery mode R$* $: < $&{deliveryMode} > $1 R< d > $* $@ deferred R< $* > $* $: $2 # authenticated? dnl done first: we can require authentication for every mail transaction dnl workspace: address as given by MAIL FROM: (sender) R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL R$* $| $#$+ $#$2 dnl undo damage: remove result of tls_client call R$* $| $* $: $1 dnl workspace: address as given by MAIL FROM: R<> $@ we MUST accept <> (RFC 1123) ifdef(`_ACCEPT_UNQUALIFIED_SENDERS_',`dnl',`dnl dnl do some additional checks dnl no user@host dnl no user@localhost (if nonlocal sender) dnl this is a pretty simple canonification, it will not catch every case dnl just make sure the address has <> around it (which is required by dnl the RFC anyway, maybe we should complain if they are missing...) dnl dirty trick: if it is user@host, just add a dot: user@host. this will dnl not be modified by host lookups. R$+ $: $1 R<$+> $: <@> <$1> R$+ $: <@> <$1> dnl workspace: <@>
dnl prepend daemon_flags R$* $: $&{daemon_flags} $| $1 dnl workspace: ${daemon_flags} $| <@>
dnl do not allow these at all or only from local systems? R$* f $* $| <@> < $* @ $- > $: < ? $&{client_name} > < $3 @ $4 > dnl accept unqualified sender: change mark to avoid test R$* u $* $| <@> < $* > $: < $3 > dnl workspace: ${daemon_flags} $| <@>
dnl or:
dnl or:
dnl remove daemon_flags R$* $| $* $: $2 # handle case of @localhost on address R<@> < $* @ localhost > $: < ? $&{client_name} > < $1 @ localhost > R<@> < $* @ [127.0.0.1] > $: < ? $&{client_name} > < $1 @ [127.0.0.1] > R<@> < $* @ localhost.$m > $: < ? $&{client_name} > < $1 @ localhost.$m > ifdef(`_NO_UUCP_', `dnl', `R<@> < $* @ localhost.UUCP > $: < ? $&{client_name} > < $1 @ localhost.UUCP >') dnl workspace: < ? $&{client_name} > dnl or: <@>
dnl or:
(thanks to u in ${daemon_flags}) R<@> $* $: $1 no localhost as domain dnl workspace: < ? $&{client_name} > dnl or:
dnl or:
(thanks to u in ${daemon_flags}) R $* $: $2 local client: ok R <$+> $#error $@ 5.5.4 $: "_CODE553 Real domain name required for sender address" dnl remove (happens only if ${client_name} == "" or u in ${daemon_flags}) R $* $: $1') dnl workspace: address (or
) R$* $: $>CanonAddr $1 canonify sender address and mark it dnl workspace: CanonicalAddress (i.e. address in canonical form localpart<@host>) dnl there is nothing behind the <@host> so no trailing $* needed R $* < @ $+ . > $1 < @ $2 > strip trailing dots # handle non-DNS hostnames (*.bitnet, *.decnet, *.uucp, etc) R $* < @ $* $=P > $: <_RES_OK_> $1 < @ $2 $3 > dnl workspace CanonicalAddress where mark is ? or OK dnl A sender address with my local host name ($j) is safe R $* < @ $j > $: <_RES_OK_> $1 < @ $j > ifdef(`_ACCEPT_UNRESOLVABLE_DOMAINS_', `R $* < @ $+ > $: <_RES_OK_> $1 < @ $2 > ... unresolvable OK', `R $* < @ $+ > $: $) > $1 < @ $2 > R> $* < @ $+ > $: <$2> $3 < @ $4 >') dnl workspace CanonicalAddress where mark is ?, _RES_OK_, PERM, TEMP dnl mark is ? iff the address is user (wo @domain) ifdef(`_ACCESS_TABLE_', `dnl # check sender address: user@address, user@, address dnl should we remove +ext from user? dnl workspace: CanonicalAddress where mark is: ?, _RES_OK_, PERM, TEMP R<$+> $+ < @ $* > $: @<$1> <$2 < @ $3 >> $| R<$+> $+ $: @<$1> <$2> $| dnl workspace: @ $| <@type:address> .... dnl $| is used as delimiter, otherwise false matches may occur: > dnl will only return user<@domain when "reversing" the args R@ <$+> <$*> $| <$+> $: <@> <$1> <$2> $| $>SearchList <+ From> $| <$3> <> dnl workspace: <@> $| R<@> <$+> <$*> $| <$*> $: <$3> <$1> <$2> reverse result dnl workspace: # retransform for further use dnl required form: dnl CanonicalAddress R <$+> <$*> $: <$1> $2 no match R<$+> <$+> <$*> $: <$1> $3 relevant result, keep it', `dnl') dnl workspace CanonicalAddress dnl mark is ? iff the address is user (wo @domain) ifdef(`_ACCEPT_UNQUALIFIED_SENDERS_',`dnl',`dnl # handle case of no @domain on address dnl prepend daemon_flags R $* $: $&{daemon_flags} $| $1 dnl accept unqualified sender: change mark to avoid test R$* u $* $| $* $: <_RES_OK_> $3 dnl remove daemon_flags R$* $| $* $: $2 R $* $: < ? $&{client_addr} > $1 R $* $@ <_RES_OK_> ...local unqualed ok R $* $#error $@ 5.5.4 $: "_CODE553 Domain name required for sender address " $&f ...remote is not') # check results R $* $: @ $1 mark address: nothing known about it R<$={ResOk}> $* $: @ $2 domain ok R $* $#error $@ 4.1.8 $: "451 Domain of sender address " $&f " does not resolve" R $* $#error $@ 5.1.8 $: "_CODE553 Domain of sender address " $&f " does not exist" ifdef(`_ACCESS_TABLE_', `dnl R<$={Accept}> $* $# $1 accept from access map R $* $#discard $: discard R $* $#error $@ quarantine $: $1 R $* $#error ifdef(`confREJECT_MSG', `$: confREJECT_MSG', `$@ 5.7.1 $: "550 Access denied"') dnl error tag R $* $#error $@ $1.$2.$3 $: $4 R $* $#error $: $1 ifdef(`_ATMPF_', `R<_ATMPF_> $* $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl generic error from access map R<$+> $* $#error $: $1 error from access db', `dnl') dnl workspace: @ CanonicalAddress (i.e. address in canonical form localpart<@host>) ifdef(`_BADMX_CHK_', `dnl R@ $*<@$+>$* $: $1<@$2>$3 $| $>BadMX $2 R$* $| $#$* $#$2 SBadMX # Look up MX records and ferret away a copy of the original address. # input: domain part of address to check R$+ $:<$1><:$(mxlist $1$):><:> # workspace: <: mxlist-result $><:> R<$+><:$*:><$*> $#error $@ 4.1.2 $: "450 MX lookup failure for "$1 # workspace: # Recursively run badmx check on each mx. R<$*><:$+:$*><:$*> <$1><:$3><: $4 $(badmx $2 $):> # See if any of them fail. R<$*><$*><$*:$*> $#error $@ 5.1.2 $:"550 Illegal MX record for host "$1 # Reverse the mxlists so we can use the same argument order again. R<$*><$*><$*> $:<$1><$3><$2> R<$*><:$+:$*><:$*> <$1><:$3><:$4 $(dnsA $2 $) :> # Reverse the lists so we can use the same argument order again. R<$*><$*><$*> $:<$1><$3><$2> R<$*><:$+:$*><:$*> <$1><:$3><:$4 $(BadMXIP $2 $) :> R<$*><$*><$*:$*> $#error $@ 5.1.2 $:"550 Invalid MX record for host "$1', `dnl') ###################################################################### ### check_rcpt -- check SMTP ``RCPT TO:'' command argument ###################################################################### SLocal_check_rcpt Scheck`'_U_`'rcpt R$* $: $1 $| $>"Local_check_rcpt" $1 R$* $| $#$* $#$2 R$* $| $* $@ $>"Basic_check_rcpt" $1 SBasic_check_rcpt # empty address? R<> $#error $@ nouser $: "553 User address required" R$@ $#error $@ nouser $: "553 User address required" # check for deferred delivery mode R$* $: < $&{deliveryMode} > $1 R< d > $* $@ deferred R< $* > $* $: $2 ifdef(`_REQUIRE_QUAL_RCPT_', `dnl dnl this code checks for user@host where host is not a FQHN. dnl it is not activated. dnl notice: code to check for a recipient without a domain name is dnl available down below; look for the same macro. dnl this check is done here because the name might be qualified by the dnl canonicalization. # require fully qualified domain part? dnl very simple canonification: make sure the address is in < > R$+ $: $1 R <$+> $: <@> <$1> R $+ $: <@> <$1> R<@> < postmaster > $: postmaster R<@> < $* @ $+ . $+ > $: < $1 @ $2 . $3 > dnl prepend daemon_flags R<@> $* $: $&{daemon_flags} $| <@> $1 dnl workspace: ${daemon_flags} $| <@>
dnl _r_equire qual.rcpt: ok R$* r $* $| <@> < $+ @ $+ > $: < $3 @ $4 > dnl do not allow these at all or only from local systems? R$* r $* $| <@> < $* > $: < ? $&{client_name} > < $3 > R < $* > $: <$1> R < $* > $: <$1> R <$+> $#error $@ 5.5.4 $: "553 Fully qualified domain name required" dnl remove daemon_flags for other cases R$* $| <@> $* $: $2', `dnl') dnl ################################################################## dnl call subroutines for recipient and relay dnl possible returns from subroutines: dnl $#TEMP temporary failure dnl $#error permanent failure (or temporary if from access map) dnl $#other stop processing dnl RELAY RELAYing allowed dnl other otherwise ###################################################################### R$* $: $1 $| @ $>"Rcpt_ok" $1 dnl temporary failure? remove mark @ and remember R$* $| @ $#TEMP $+ $: $1 $| T $2 dnl error or ok (stop) R$* $| @ $#$* $#$2 ifdef(`_PROMISCUOUS_RELAY_', `divert(-1)', `dnl') R$* $| @ RELAY $@ RELAY dnl something else: call check sender (relay) R$* $| @ $* $: O $| $>"Relay_ok" $1 dnl temporary failure: call check sender (relay) R$* $| T $+ $: T $2 $| $>"Relay_ok" $1 dnl temporary failure? return that R$* $| $#TEMP $+ $#error $2 dnl error or ok (stop) R$* $| $#$* $#$2 R$* $| RELAY $@ RELAY dnl something else: return previous temp failure R T $+ $| $* $#error $1 # anything else is bogus R$* $#error $@ 5.7.1 $: confRELAY_MSG divert(0) ###################################################################### ### Rcpt_ok: is the recipient ok? dnl input: recipient address (RCPT TO) dnl output: see explanation at call ###################################################################### SRcpt_ok ifdef(`_LOOSE_RELAY_CHECK_',`dnl R$* $: $>CanonAddr $1 R$* < @ $* . > $1 < @ $2 > strip trailing dots', `R$* $: $>ParseRecipient $1 strip relayable hosts') ifdef(`_BESTMX_IS_LOCAL_',`dnl ifelse(_BESTMX_IS_LOCAL_, `', `dnl # unlimited bestmx R$* < @ $* > $* $: $1 < @ $2 @@ $(bestmx $2 $) > $3', `dnl # limit bestmx to $=B R$* < @ $* $=B > $* $: $1 < @ $2 $3 @@ $(bestmx $2 $3 $) > $4') R$* $=O $* < @ $* @@ $=w . > $* $@ $>"Rcpt_ok" $1 $2 $3 R$* < @ $* @@ $=w . > $* $: $1 < @ $3 > $4 R$* < @ $* @@ $* > $* $: $1 < @ $2 > $4') ifdef(`_BLACKLIST_RCPT_',`dnl ifdef(`_ACCESS_TABLE_', `dnl # blacklist local users or any host from receiving mail R$* $: $1 dnl user is now tagged with @ to be consistent with check_mail dnl and to distinguish users from hosts (com would be host, com@ would be user) R $+ < @ $=w > $: <> <$1 < @ $2 >> $| R $+ < @ $* > $: <> <$1 < @ $2 >> $| R $+ $: <> <$1> $| dnl $| is used as delimiter, otherwise false matches may occur: > dnl will only return user<@domain when "reversing" the args R<> <$*> $| <$+> $: <@> <$1> $| $>SearchList <+ To> $| <$2> <> R<@> <$*> $| <$*> $: <$2> <$1> reverse result R <$*> $: @ $1 mark address as no match dnl we may have to filter here because otherwise some RHSs dnl would be interpreted as generic error messages... dnl error messages should be "tagged" by prefixing them with error: ! dnl that would make a lot of things easier. R<$={Accept}> <$*> $: @ $2 mark address as no match ifdef(`_ACCESS_SKIP_', `dnl R <$*> $: @ $1 mark address as no match', `dnl') ifdef(`_DELAY_COMPAT_8_10_',`dnl dnl compatility with 8.11/8.10: dnl we have to filter these because otherwise they would be interpreted dnl as generic error message... dnl error messages should be "tagged" by prefixing them with error: ! dnl that would make a lot of things easier. dnl maybe we should stop checks already here (if SPAM_xyx)? R<$={SpamTag}> <$*> $: @ $2 mark address as no match') R $* $#error $@ 5.2.1 $: confRCPTREJ_MSG R $* $#discard $: discard R $* $#error $@ quarantine $: $1 dnl error tag R $* $#error $@ $1.$2.$3 $: $4 R $* $#error $: $1 ifdef(`_ATMPF_', `R<_ATMPF_> $* $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl generic error from access map R<$+> $* $#error $: $1 error from access db R@ $* $1 remove mark', `dnl')', `dnl') ifdef(`_PROMISCUOUS_RELAY_', `divert(-1)', `dnl') # authenticated via TLS? R$* $: $1 $| $>RelayTLS client authenticated? R$* $| $# $+ $# $2 error/ok? R$* $| $* $: $1 no R$* $: $1 $| $>"Local_Relay_Auth" $&{auth_type} dnl workspace: localpart<@domain> $| result of Local_Relay_Auth R$* $| $# $* $# $2 dnl if Local_Relay_Auth returns NO then do not check $={TrustAuthMech} R$* $| NO $: $1 R$* $| $* $: $1 $| $&{auth_type} dnl workspace: localpart<@domain> [ $| ${auth_type} ] dnl empty ${auth_type}? R$* $| $: $1 dnl mechanism ${auth_type} accepted? dnl use $# to override further tests (delay_checks): see check_rcpt below R$* $| $={TrustAuthMech} $# RELAY dnl remove ${auth_type} R$* $| $* $: $1 dnl workspace: localpart<@domain> | localpart ifelse(defn(`_NO_UUCP_'), `r', `R$* ! $* < @ $* > $: $2 < @ BANG_PATH > R$* ! $* $: $2 < @ BANG_PATH >', `dnl') # anything terminating locally is ok ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl R$+ < @ $* $=m > $@ RELAY', `dnl') R$+ < @ $=w > $@ RELAY ifdef(`_RELAY_HOSTS_ONLY_', `R$+ < @ $=R > $@ RELAY ifdef(`_ACCESS_TABLE_', `dnl ifdef(`_RELAY_FULL_ADDR_', `dnl R$+ < @ $+ > $: <$(access To:$1@$2 $: ? $)> <$1 < @ $2 >> R <$+ < @ $+ >> $: <$(access To:$2 $: ? $)> <$1 < @ $2 >>',` R$+ < @ $+ > $: <$(access To:$2 $: ? $)> <$1 < @ $2 >>') dnl workspace: > R <$+ < @ $+ >> $: <$(access $2 $: ? $)> <$1 < @ $2 >>',`dnl')', `R$+ < @ $* $=R > $@ RELAY ifdef(`_ACCESS_TABLE_', `dnl ifdef(`_RELAY_FULL_ADDR_', `dnl R$+ < @ $+ > $: $1 < @ $2 > $| $>SearchList <+ To> $| <> R$+ < @ $+ > $| <$*> $: <$3> <$1 <@ $2>> R$+ < @ $+ > $| $* $: <$3> <$1 <@ $2>>', `R$+ < @ $+ > $: $>D <$2> <+ To> <$1 < @ $2 >>')')') ifdef(`_ACCESS_TABLE_', `dnl dnl workspace: > R $* $@ RELAY ifdef(`_ATMPF_', `R<$* _ATMPF_> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R<$*> <$*> $: $2',`dnl') ifdef(`_RELAY_MX_SERVED_', `dnl # allow relaying for hosts which we MX serve R$+ < @ $+ > $: < : $(mxserved $2 $) : > $1 < @ $2 > dnl this must not necessarily happen if the client is checked first... R< : $* : > $* $#TEMP $@ 4.4.0 $: "450 Can not check MX records for recipient host " $1 R<$* : $=w . : $*> $* $@ RELAY R< : $* : > $* $: $2', `dnl') # check for local user (i.e. unqualified address) R$* $: $1 R $* < @ $+ > $: $1 < @ $2 > # local user is ok dnl is it really? the standard requires user@domain, not just user dnl but we should accept it anyway (maybe making it an option: dnl RequireFQDN ?) dnl postmaster must be accepted without domain (DRUMS) ifdef(`_REQUIRE_QUAL_RCPT_', `dnl R postmaster $@ OK # require qualified recipient? dnl prepend daemon_flags R $+ $: $&{daemon_flags} $| $1 dnl workspace: ${daemon_flags} $| localpart dnl do not allow these at all or only from local systems? dnl r flag? add client_name R$* r $* $| $+ $: < ? $&{client_name} > $3 dnl no r flag: relay to local user (only local part) # no qualified recipient required R$* $| $+ $@ RELAY dnl client_name is empty R $+ $@ RELAY dnl client_name is local R $+ $@ RELAY dnl client_name is not local R $+ $#error $@ 5.5.4 $: "553 Domain name required"', `dnl dnl no qualified recipient required R $+ $@ RELAY') dnl it is a remote user: remove mark and then check client R<$+> $* $: $2 dnl currently the recipient address is not used below ###################################################################### ### Relay_ok: is the relay/sender ok? dnl input: ignored dnl output: see explanation at call ###################################################################### SRelay_ok # anything originating locally is ok # check IP address R$* $: $&{client_addr} R$@ $@ RELAY originated locally R0 $@ RELAY originated locally R127.0.0.1 $@ RELAY originated locally RIPv6:::1 $@ RELAY originated locally R$=R $* $@ RELAY relayable IP address ifdef(`_ACCESS_TABLE_', `dnl R$* $: $>A <$1> <+ Connect> <$1> R $* $@ RELAY relayable IP address ifdef(`_FFR_REJECT_IP_IN_CHECK_RCPT_',`dnl dnl this will cause rejections in cases like: dnl Connect:My.Host.Domain RELAY dnl Connect:My.Net REJECT dnl since in check_relay client_name is checked before client_addr R $* $@ REJECT rejected IP address') ifdef(`_ATMPF_', `R<_ATMPF_> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R<$*> <$*> $: $2', `dnl') R$* $: [ $1 ] put brackets around it... R$=w $@ RELAY ... and see if it is local ifdef(`_RELAY_DB_FROM_', `define(`_RELAY_MAIL_FROM_', `1')')dnl ifdef(`_RELAY_LOCAL_FROM_', `define(`_RELAY_MAIL_FROM_', `1')')dnl ifdef(`_RELAY_MAIL_FROM_', `dnl dnl input: {client_addr} or something "broken" dnl just throw the input away; we do not need it. # check whether FROM is allowed to use system as relay R$* $: $>CanonAddr $&f R $+ < @ $+ . > $1 < @ $2 > remove trailing dot ifdef(`_RELAY_LOCAL_FROM_', `dnl # check whether local FROM is ok R $+ < @ $=w > $@ RELAY FROM local', `dnl') ifdef(`_RELAY_DB_FROM_', `dnl R $+ < @ $+ > $: <@> $>SearchList $| ifdef(`_RELAY_DB_FROM_DOMAIN_', ifdef(`_RELAY_HOSTS_ONLY_', `', `')) <> R<@> $@ RELAY RELAY FROM sender ok ifdef(`_ATMPF_', `R<@> <_ATMPF_> $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') ', `dnl ifdef(`_RELAY_DB_FROM_DOMAIN_', `errprint(`*** ERROR: _RELAY_DB_FROM_DOMAIN_ requires _RELAY_DB_FROM_ ')', `dnl') dnl')', `dnl') dnl notice: the rulesets above do not leave a unique workspace behind. dnl it does not matter in this case because the following rule ignores dnl the input. otherwise these rules must "clean up" the workspace. # check client name: first: did it resolve? dnl input: ignored R$* $: < $&{client_resolve} > R $#TEMP $@ 4.4.0 $: "450 Relaying temporarily denied. Cannot resolve PTR record for " $&{client_addr} R $#error $@ 5.7.1 $: "550 Relaying denied. IP name possibly forged " $&{client_name} R $#error $@ 5.7.1 $: "550 Relaying denied. IP name lookup failed " $&{client_name} dnl ${client_resolve} should be OK, so go ahead R$* $: <@> $&{client_name} dnl should not be necessary since it has been done for client_addr already dnl this rule actually may cause a problem if {client_name} resolves to "" dnl however, this should not happen since the forward lookup should fail dnl and {client_resolve} should be TEMP or FAIL. dnl nevertheless, removing the rule doesn't hurt. dnl R<@> $@ RELAY dnl workspace: <@> ${client_name} (not empty) # pass to name server to make hostname canonical R<@> $* $=P $: $1 $2 R<@> $+ $: $[ $1 $] dnl workspace: ${client_name} (canonified) R$* . $1 strip trailing dots ifdef(`_RELAY_ENTIRE_DOMAIN_', `dnl R $* $=m $@ RELAY', `dnl') R $=w $@ RELAY ifdef(`_RELAY_HOSTS_ONLY_', `R $=R $@ RELAY ifdef(`_ACCESS_TABLE_', `dnl R $* $: <$(access Connect:$1 $: ? $)> <$1> R <$*> $: <$(access $1 $: ? $)> <$1>',`dnl')', `R $* $=R $@ RELAY ifdef(`_ACCESS_TABLE_', `dnl R $* $: $>D <$1> <+ Connect> <$1>',`dnl')') ifdef(`_ACCESS_TABLE_', `dnl R $* $@ RELAY ifdef(`_ATMPF_', `R<$* _ATMPF_> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R<$*> <$*> $: $2',`dnl') dnl end of _PROMISCUOUS_RELAY_ divert(0) ifdef(`_DELAY_CHECKS_',`dnl # turn a canonical address in the form user<@domain> # qualify unqual. addresses with $j dnl it might have been only user (without <@domain>) SFullAddr R$* <@ $+ . > $1 <@ $2 > R$* <@ $* > $@ $1 <@ $2 > R$+ $@ $1 <@ $j > SDelay_TLS_Clt # authenticated? dnl code repeated here from Basic_check_mail dnl only called from check_rcpt in delay mode if checkrcpt returns $# R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL R$* $| $#$+ $#$2 dnl return result from checkrcpt R$* $| $* $# $1 R$* $# $1 SDelay_TLS_Clt2 # authenticated? dnl code repeated here from Basic_check_mail dnl only called from check_rcpt in delay mode if stopping due to Friend/Hater R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL R$* $| $#$+ $#$2 dnl return result from friend/hater check R$* $| $* $@ $1 R$* $@ $1 # call all necessary rulesets Scheck_rcpt dnl this test should be in the Basic_check_rcpt ruleset dnl which is the correct DSN code? # R$@ $#error $@ 5.1.3 $: "553 Recipient address required" R$+ $: $1 $| $>checkrcpt $1 dnl now we can simply stop checks by returning "$# xyz" instead of just "ok" dnl on error (or discard) stop now R$+ $| $#error $* $#error $2 R$+ $| $#discard $* $#discard $2 dnl otherwise call tls_client; see above R$+ $| $#$* $@ $>"Delay_TLS_Clt" $2 R$+ $| $* $: $>FullAddr $>CanonAddr $1 ifdef(`_SPAM_FH_', `dnl lookup user@ and user@address ifdef(`_ACCESS_TABLE_', `', `errprint(`*** ERROR: FEATURE(`delay_checks', `argument') requires FEATURE(`access_db') ')')dnl dnl one of the next two rules is supposed to match dnl this code has been copied from BLACKLIST... etc dnl and simplified by omitting some < >. R $+ < @ $=w > $: <> $1 < @ $2 > $| R $+ < @ $* > $: <> $1 < @ $2 > $| dnl R $@ something_is_very_wrong_here # lookup the addresses only with Spam tag R<> $* $| <$+> $: <@> $1 $| $>SearchList $| <$2> <> R<@> $* $| $* $: $2 $1 reverse result dnl', `dnl') ifdef(`_SPAM_FRIEND_', `# is the recipient a spam friend? ifdef(`_SPAM_HATER_', `errprint(`*** ERROR: define either Hater or Friend -- not both. ')', `dnl') R $+ $@ $>"Delay_TLS_Clt2" SPAMFRIEND R<$*> $+ $: $2', `dnl') ifdef(`_SPAM_HATER_', `# is the recipient no spam hater? R $+ $: $1 spam hater: continue checks R<$*> $+ $@ $>"Delay_TLS_Clt2" NOSPAMHATER everyone else: stop dnl',`dnl') dnl run further checks: check_mail dnl should we "clean up" $&f? ifdef(`_FFR_MAIL_MACRO', `R$* $: $1 $| $>checkmail $&{mail_from}', `R$* $: $1 $| $>checkmail <$&f>') dnl recipient (canonical format) $| result of checkmail R$* $| $#$* $#$2 dnl run further checks: check_relay R$* $| $* $: $1 $| $>checkrelay $&{client_name} $| $&{client_addr} R$* $| $#$* $#$2 R$* $| $* $: $1 ', `dnl') ifdef(`_BLOCK_BAD_HELO_', `dnl R$* $: $1 $| <$&{auth_authen}> Get auth info dnl Bypass the test for users who have authenticated. R$* $| <$+> $: $1 skip if auth R$* $| <$*> $: $1 $| <$&{client_addr}> [$&s] Get connection info dnl Bypass for local clients -- IP address starts with $=R R$* $| <$=R $*> [$*] $: $1 skip if local client dnl Bypass a "sendmail -bs" session, which use 0 for client ip address R$* $| <0> [$*] $: $1 skip if sendmail -bs dnl Reject our IP - assumes "[ip]" is in class $=w R$* $| <$*> $=w $#error $@ 5.7.1 $:"550 bogus HELO name used: " $&s dnl Reject our hostname R$* $| <$*> [$=w] $#error $@ 5.7.1 $:"550 bogus HELO name used: " $&s dnl Pass anything else with a "." in the domain parameter R$* $| <$*> [$+.$+] $: $1 qualified domain ok dnl Reject if there was no "." or only an initial or final "." R$* $| <$*> [$*] $#error $@ 5.7.1 $:"550 bogus HELO name used: " $&s dnl Clean up the workspace R$* $| $* $: $1 ', `dnl') ifdef(`_ACCESS_TABLE_', `dnl', `divert(-1)') ###################################################################### ### F: LookUpFull -- search for an entry in access database ### ### lookup of full key (which should be an address) and ### variations if +detail exists: +* and without +detail ### ### Parameters: ### <$1> -- key ### <$2> -- default (what to return if not found in db) dnl must not be empty ### <$3> -- mark (must be <(!|+) single-token>) ### ! does lookup only with tag ### + does lookup with and without tag ### <$4> -- passthru (additional data passed unchanged through) dnl returns: dnl ###################################################################### SF dnl workspace: dnl full lookup dnl 2 3 4 5 R<$+> <$*> <$- $-> <$*> $: <$(access $4`'_TAG_DELIM_`'$1 $: ? $)> <$1> <$2> <$3 $4> <$5> dnl no match, try without tag dnl 1 2 3 4 R <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4> dnl no match, +detail: try +* dnl 1 2 3 4 5 6 7 R <$+ + $* @ $+> <$*> <$- $-> <$*> $: <$(access $6`'_TAG_DELIM_`'$1+*@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7> dnl no match, +detail: try +* without tag dnl 1 2 3 4 5 6 R <$+ + $* @ $+> <$*> <+ $-> <$*> $: <$(access $1+*@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6> dnl no match, +detail: try without +detail dnl 1 2 3 4 5 6 7 R <$+ + $* @ $+> <$*> <$- $-> <$*> $: <$(access $6`'_TAG_DELIM_`'$1@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7> dnl no match, +detail: try without +detail and without tag dnl 1 2 3 4 5 6 R <$+ + $* @ $+> <$*> <+ $-> <$*> $: <$(access $1@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6> dnl no match, return dnl 1 2 3 4 5 R <$+> <$*> <$- $-> <$*> $@ <$2> <$5> ifdef(`_ATMPF_', `dnl tempfail? dnl 2 3 4 5 R<$+ _ATMPF_> <$*> <$- $-> <$*> $@ <_ATMPF_> <$5>', `dnl') dnl match, return dnl 2 3 4 5 R<$+> <$*> <$- $-> <$*> $@ <$1> <$5> ###################################################################### ### E: LookUpExact -- search for an entry in access database ### ### Parameters: ### <$1> -- key ### <$2> -- default (what to return if not found in db) dnl must not be empty ### <$3> -- mark (must be <(!|+) single-token>) ### ! does lookup only with tag ### + does lookup with and without tag ### <$4> -- passthru (additional data passed unchanged through) dnl returns: dnl ###################################################################### SE dnl 2 3 4 5 R<$*> <$*> <$- $-> <$*> $: <$(access $4`'_TAG_DELIM_`'$1 $: ? $)> <$1> <$2> <$3 $4> <$5> dnl no match, try without tag dnl 1 2 3 4 R <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4> dnl no match, return default passthru dnl 1 2 3 4 5 R <$+> <$*> <$- $-> <$*> $@ <$2> <$5> ifdef(`_ATMPF_', `dnl tempfail? dnl 2 3 4 5 R<$+ _ATMPF_> <$*> <$- $-> <$*> $@ <_ATMPF_> <$5>', `dnl') dnl match, return dnl 2 3 4 5 R<$+> <$*> <$- $-> <$*> $@ <$1> <$5> ###################################################################### ### U: LookUpUser -- search for an entry in access database ### ### lookup of key (which should be a local part) and ### variations if +detail exists: +* and without +detail ### ### Parameters: ### <$1> -- key (user@) ### <$2> -- default (what to return if not found in db) dnl must not be empty ### <$3> -- mark (must be <(!|+) single-token>) ### ! does lookup only with tag ### + does lookup with and without tag ### <$4> -- passthru (additional data passed unchanged through) dnl returns: dnl ###################################################################### SU dnl user lookups are always with trailing @ dnl 2 3 4 5 R<$+> <$*> <$- $-> <$*> $: <$(access $4`'_TAG_DELIM_`'$1 $: ? $)> <$1> <$2> <$3 $4> <$5> dnl no match, try without tag dnl 1 2 3 4 R <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4> dnl do not remove the @ from the lookup: dnl it is part of the +detail@ which is omitted for the lookup dnl no match, +detail: try +* dnl 1 2 3 4 5 6 R <$+ + $* @> <$*> <$- $-> <$*> $: <$(access $5`'_TAG_DELIM_`'$1+*@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6> dnl no match, +detail: try +* without tag dnl 1 2 3 4 5 R <$+ + $* @> <$*> <+ $-> <$*> $: <$(access $1+*@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5> dnl no match, +detail: try without +detail dnl 1 2 3 4 5 6 R <$+ + $* @> <$*> <$- $-> <$*> $: <$(access $5`'_TAG_DELIM_`'$1@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6> dnl no match, +detail: try without +detail and without tag dnl 1 2 3 4 5 R <$+ + $* @> <$*> <+ $-> <$*> $: <$(access $1@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5> dnl no match, return dnl 1 2 3 4 5 R <$+> <$*> <$- $-> <$*> $@ <$2> <$5> ifdef(`_ATMPF_', `dnl tempfail? dnl 2 3 4 5 R<$+ _ATMPF_> <$*> <$- $-> <$*> $@ <_ATMPF_> <$5>', `dnl') dnl match, return dnl 2 3 4 5 R<$+> <$*> <$- $-> <$*> $@ <$1> <$5> ###################################################################### ### SearchList: search a list of items in the access map ### Parameters: ### $| ... <> dnl maybe we should have a @ (again) in front of the mark to dnl avoid errorneous matches (with error messages?) dnl if we can make sure that tag is always a single token dnl then we can omit the delimiter $|, otherwise we need it dnl to avoid errorneous matchs (first rule: D: if there dnl is that mark somewhere in the list, it will be taken). dnl moreover, we can do some tricks to enforce lookup with dnl the tag only, e.g.: ### where "exact" is either "+" or "!": ### <+ TAG> lookup with and w/o tag ### lookup with tag dnl Warning: + and ! should be in OperatorChars (otherwise there must be dnl a blank between them and the tag. ### possible values for "mark" are: ### D: recursive host lookup (LookUpDomain) dnl A: recursive address lookup (LookUpAddress) [not yet required] ### E: exact lookup, no modifications ### F: full lookup, try user+ext@domain and user@domain ### U: user lookup, try user+ext and user (input must have trailing @) ### return: or (not found) ###################################################################### # class with valid marks for SearchList dnl if A is activated: add it C{Src}E F D U ifdef(`_FFR_SRCHLIST_A', `A') SSearchList # just call the ruleset with the name of the tag... nice trick... dnl 2 3 4 R<$+> $| <$={Src}:$*> <$*> $: <$1> $| <$4> $| $>$2 <$3> <$1> <> dnl workspace: $| $| <> dnl no match and nothing left: return R<$+> $| <> $| <> $@ dnl no match but something left: continue R<$+> $| <$+> $| <> $@ $>SearchList <$1> $| <$2> dnl match: return R<$+> $| <$*> $| <$+> <> $@ <$3> dnl return result from recursive invocation R<$+> $| <$+> $@ <$2> dnl endif _ACCESS_TABLE_ divert(0) ###################################################################### ### trust_auth: is user trusted to authenticate as someone else? ### ### Parameters: ### $1: AUTH= parameter from MAIL command ###################################################################### dnl empty ruleset definition so it can be called SLocal_trust_auth Strust_auth R$* $: $&{auth_type} $| $1 # required by RFC 2554 section 4. R$@ $| $* $#error $@ 5.7.1 $: "550 not authenticated" dnl seems to be useful... R$* $| $&{auth_authen} $@ identical R$* $| <$&{auth_authen}> $@ identical dnl call user supplied code R$* $| $* $: $1 $| $>"Local_trust_auth" $2 R$* $| $#$* $#$2 dnl default: error R$* $#error $@ 5.7.1 $: "550 " $&{auth_authen} " not allowed to act as " $&{auth_author} ###################################################################### ### Relay_Auth: allow relaying based on authentication? ### ### Parameters: ### $1: ${auth_type} ###################################################################### SLocal_Relay_Auth ###################################################################### ### srv_features: which features to offer to a client? ### (done in server) ###################################################################### Ssrv_features ifdef(`_LOCAL_SRV_FEATURES_', `dnl R$* $: $1 $| $>"Local_srv_features" $1 R$* $| $#$* $#$2 R$* $| $* $: $1', `dnl') ifdef(`_ACCESS_TABLE_', `dnl R$* $: $>D <$&{client_name}> <> R$* $: $>A <$&{client_addr}> <> R$* $: <$(access SRV_FEAT_TAG`'_TAG_DELIM_ $: ? $)> R$* $@ OK ifdef(`_ATMPF_', `dnl tempfail? R<$* _ATMPF_>$* $#temp', `dnl') R<$+>$* $# $1') ###################################################################### ### try_tls: try to use STARTTLS? ### (done in client) ###################################################################### Stry_tls ifdef(`_LOCAL_TRY_TLS_', `dnl R$* $: $1 $| $>"Local_try_tls" $1 R$* $| $#$* $#$2 R$* $| $* $: $1', `dnl') ifdef(`_ACCESS_TABLE_', `dnl R$* $: $>D <$&{server_name}> <> R$* $: $>A <$&{server_addr}> <> R$* $: <$(access TLS_TRY_TAG`'_TAG_DELIM_ $: ? $)> R$* $@ OK ifdef(`_ATMPF_', `dnl tempfail? R<$* _ATMPF_>$* $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R$* $#error $@ 5.7.1 $: "550 do not try TLS with " $&{server_name} " ["$&{server_addr}"]"') ###################################################################### ### tls_rcpt: is connection with server "good" enough? ### (done in client, per recipient) dnl called from deliver() before RCPT command ### ### Parameters: ### $1: recipient ###################################################################### Stls_rcpt ifdef(`_LOCAL_TLS_RCPT_', `dnl R$* $: $1 $| $>"Local_tls_rcpt" $1 R$* $| $#$* $#$2 R$* $| $* $: $1', `dnl') ifdef(`_ACCESS_TABLE_', `dnl dnl store name of other side R$* $: $(macro {TLS_Name} $@ $&{server_name} $) $1 dnl canonify recipient address R$+ $: $>CanonAddr $1 dnl strip trailing dots R $+ < @ $+ . > $1 <@ $2 > dnl full address? R $+ < @ $+ > $: $1 <@ $2 > $| dnl only localpart? R $+ $: $1 $| dnl look it up dnl also look up a default value via E: R$* $| $+ $: $1 $| $>SearchList $| $2 <> dnl found nothing: stop here R$* $| $@ OK ifdef(`_ATMPF_', `dnl tempfail? R$* $| <$* _ATMPF_> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl use the generic routine (for now) R$* $| <$+> $@ $>"TLS_connection" $&{verify} $| <$2>') ###################################################################### ### tls_client: is connection with client "good" enough? ### (done in server) ### ### Parameters: ### ${verify} $| (MAIL|STARTTLS) ###################################################################### dnl MAIL: called from check_mail dnl STARTTLS: called from smtp() after STARTTLS has been accepted Stls_client ifdef(`_LOCAL_TLS_CLIENT_', `dnl R$* $: $1 $>"Local_tls_client" $1 R$* $#$* $#$2 R$* $* $: $1', `dnl') ifdef(`_ACCESS_TABLE_', `dnl dnl store name of other side R$* $: $(macro {TLS_Name} $@ $&{client_name} $) $1 dnl ignore second arg for now dnl maybe use it to distinguish permanent/temporary error? dnl if MAIL: permanent (STARTTLS has not been offered) dnl if STARTTLS: temporary (offered but maybe failed) R$* $| $* $: $1 $| $>D <$&{client_name}> <> R$* $| $* $: $1 $| $>A <$&{client_addr}> <> dnl do a default lookup: just TLS_CLT_TAG R$* $| $* $: $1 $| <$(access TLS_CLT_TAG`'_TAG_DELIM_ $: ? $)> ifdef(`_ATMPF_', `dnl tempfail? R$* $| <$* _ATMPF_> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R$* $@ $>"TLS_connection" $1', `dnl R$* $| $* $@ $>"TLS_connection" $1') ###################################################################### ### tls_server: is connection with server "good" enough? ### (done in client) ### ### Parameter: ### ${verify} ###################################################################### dnl i.e. has the server been authenticated and is encryption active? dnl called from deliver() after STARTTLS command Stls_server ifdef(`_LOCAL_TLS_SERVER_', `dnl R$* $: $1 $| $>"Local_tls_server" $1 R$* $| $#$* $#$2 R$* $| $* $: $1', `dnl') ifdef(`_ACCESS_TABLE_', `dnl dnl store name of other side R$* $: $(macro {TLS_Name} $@ $&{server_name} $) $1 R$* $: $1 $| $>D <$&{server_name}> <> R$* $| $* $: $1 $| $>A <$&{server_addr}> <> dnl do a default lookup: just TLS_SRV_TAG R$* $| $* $: $1 $| <$(access TLS_SRV_TAG`'_TAG_DELIM_ $: ? $)> ifdef(`_ATMPF_', `dnl tempfail? R$* $| <$* _ATMPF_> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') R$* $@ $>"TLS_connection" $1', `dnl R$* $@ $>"TLS_connection" $1') ###################################################################### ### TLS_connection: is TLS connection "good" enough? ### ### Parameters: ifdef(`_ACCESS_TABLE_', `dnl ### ${verify} $| [<>]', `dnl ### ${verify}') ### Requirement: RHS from access map, may be ? for none. dnl syntax for Requirement: dnl [(PERM|TEMP)+] (VERIFY[:bits]|ENCR:bits) [+extensions] dnl extensions: could be a list of further requirements dnl for now: CN:string {cn_subject} == string ###################################################################### STLS_connection ifdef(`_ACCESS_TABLE_', `dnl', `dnl use default error dnl deal with TLS handshake failures: abort RSOFTWARE $#error $@ ifdef(`TLS_PERM_ERR', `5.7.0', `4.7.0') $: "ifdef(`TLS_PERM_ERR', `503', `403') TLS handshake." divert(-1)') dnl common ruleset for tls_{client|server} dnl input: ${verify} $| [<>] dnl remove optional <> R$* $| <$*>$* $: $1 $| <$2> dnl workspace: ${verify} $| # create the appropriate error codes dnl permanent or temporary error? R$* $| $: $1 $| <503:5.7.0> <$2 $3> R$* $| $: $1 $| <403:4.7.0> <$2 $3> dnl default case depends on TLS_PERM_ERR R$* $| <$={Tls} $*> $: $1 $| <$2 $3> dnl workspace: ${verify} $| [] # deal with TLS handshake failures: abort RSOFTWARE $| <$-:$+> $* $#error $@ $2 $: $1 " TLS handshake failed." dnl no i.e. not requirements in the access map dnl use default error RSOFTWARE $| $* $#error $@ ifdef(`TLS_PERM_ERR', `5.7.0', `4.7.0') $: "ifdef(`TLS_PERM_ERR', `503', `403') TLS handshake failed." # deal with TLS protocol errors: abort RPROTOCOL $| <$-:$+> $* $#error $@ $2 $: $1 " STARTTLS failed." dnl no i.e. not requirements in the access map dnl use default error RPROTOCOL $| $* $#error $@ ifdef(`TLS_PERM_ERR', `5.7.0', `4.7.0') $: "ifdef(`TLS_PERM_ERR', `503', `403') STARTTLS failed." R$* $| <$*> $: <$2> <> $1 dnl separate optional requirements R$* $| <$*> $: <$2> <$3> $1 R$* $| <$*> <$={Tls}:$->$* $: <$2> <$3:$4> <> $1 dnl separate optional requirements R$* $| <$*> <$={Tls}:$- + $+>$* $: <$2> <$3:$4> <$5> $1 dnl some other value in access map: accept dnl this also allows to override the default case (if used) R$* $| $* $@ OK # authentication required: give appropriate error # other side did authenticate (via STARTTLS) dnl workspace: <{VERIFY,ENCR}[:BITS]> <[extensions]> ${verify} dnl only verification required and it succeeded R<$*> <> OK $@ OK dnl verification required and it succeeded but extensions are given dnl change it to R<$*> <$+> OK $: <$1> <$2> dnl verification required + some level of encryption R<$*> <$*> OK $: <$1> <$3> dnl just some level of encryption required R<$*> <$*> $* $: <$1> <$3> dnl workspace: dnl 1. <[extensions]> {verify} (!= OK) dnl 2. <[extensions]> dnl verification required but ${verify} is not set (case 1.) R<$-:$+> <$*> $#error $@ $2 $: $1 " authentication required" R<$-:$+> <$*> FAIL $#error $@ $2 $: $1 " authentication failed" R<$-:$+> <$*> NO $#error $@ $2 $: $1 " not authenticated" R<$-:$+> <$*> NOT $#error $@ $2 $: $1 " no authentication requested" R<$-:$+> <$*> NONE $#error $@ $2 $: $1 " other side does not support STARTTLS" dnl some other value for ${verify} R<$-:$+> <$*> $+ $#error $@ $2 $: $1 " authentication failure " $4 dnl some level of encryption required: get the maximum level (case 2.) R<$*> <$*> $: <$1> <$3> $>max $&{cipher_bits} : $&{auth_ssf} dnl compare required bits with actual bits R<$*> <$*> $- $: <$1> <$2:$4> <$3> $(arith l $@ $4 $@ $2 $) R<$-:$+><$-:$-> <$*> TRUE $#error $@ $2 $: $1 " encryption too weak " $4 " less than " $3 dnl strength requirements fulfilled dnl TLS Additional Requirements Separator dnl this should be something which does not appear in the extensions itself dnl @ could be part of a CN, DN, etc... dnl use < > ? those are encoded in CN, DN, ... define(`_TLS_ARS_', `++')dnl dnl workspace: dnl result-of-compare R<$-:$+><$-:$-> <$*> $* $: <$1:$2 _TLS_ARS_ $5> dnl workspace: dnl continue: check extensions R<$-:$+ _TLS_ARS_ > $@ OK dnl split extensions into own list R<$-:$+ _TLS_ARS_ $+ > $: <$1:$2> <$3> R<$-:$+> < $+ _TLS_ARS_ $+ > <$1:$2> <$3> <$4> R<$-:$+> $+ $@ $>"TLS_req" $3 $| <$1:$2> ###################################################################### ### TLS_req: check additional TLS requirements ### ### Parameters: [ ] $| <$-:$+> ### $-: SMTP reply code ### $+: Enhanced Status Code dnl further requirements for this ruleset: dnl name of "other side" is stored is {TLS_name} (client/server_name) dnl dnl currently only CN[:common_name] is implemented dnl right now this is only a logical AND dnl i.e. all requirements must be true dnl how about an OR? CN must be X or CN must be Y or .. dnl use a macro to compute this as a trivial sequential dnl operations (no precedences etc)? ###################################################################### STLS_req dnl no additional requirements: ok R $| $+ $@ OK dnl require CN: but no CN specified: use name of other side R $* $| <$+> $: $1 $| <$2> dnl match, check rest R $* $| <$+> $@ $>"TLS_req" $1 $| <$2> dnl CN does not match dnl 1 2 3 4 R $* $| <$-:$+> $#error $@ $4 $: $3 " CN " $&{cn_subject} " does not match " $1 dnl cert subject R $* $| <$+> $@ $>"TLS_req" $1 $| <$2> dnl CS does not match dnl 1 2 3 4 R $* $| <$-:$+> $#error $@ $4 $: $3 " Cert Subject " $&{cert_subject} " does not match " $1 dnl match, check rest R $* $| <$+> $@ $>"TLS_req" $1 $| <$2> dnl CI does not match dnl 1 2 3 4 R $* $| <$-:$+> $#error $@ $4 $: $3 " Cert Issuer " $&{cert_issuer} " does not match " $1 dnl return from recursive call ROK $@ OK ###################################################################### ### max: return the maximum of two values separated by : ### ### Parameters: [$-]:[$-] ###################################################################### Smax R: $: 0 R:$- $: $1 R$-: $: $1 R$-:$- $: $(arith l $@ $1 $@ $2 $) : $1 : $2 RTRUE:$-:$- $: $2 R$-:$-:$- $: $2 dnl endif _ACCESS_TABLE_ divert(0) ###################################################################### ### RelayTLS: allow relaying based on TLS authentication ### ### Parameters: ### none ###################################################################### SRelayTLS # authenticated? dnl we do not allow relaying for anyone who can present a cert dnl signed by a "trusted" CA. For example, even if we put verisigns dnl CA in CertPath so we can authenticate users, we do not allow dnl them to abuse our server (they might be easier to get hold of, dnl but anyway). dnl so here is the trick: if the verification succeeded dnl we look up the cert issuer in the access map dnl (maybe after extracting a part with a regular expression) dnl if this returns RELAY we relay without further questions dnl if it returns SUBJECT we perform a similar check on the dnl cert subject. ifdef(`_ACCESS_TABLE_', `dnl R$* $: $&{verify} R OK $: OK authenticated: continue R $* $@ NO not authenticated ifdef(`_CERT_REGEX_ISSUER_', `dnl R$* $: $(CERTIssuer $&{cert_issuer} $)', `R$* $: $&{cert_issuer}') R$+ $: $(access CERTISSUER`'_TAG_DELIM_`'$1 $) dnl use $# to stop further checks (delay_check) RRELAY $# RELAY ifdef(`_CERT_REGEX_SUBJECT_', `dnl RSUBJECT $: <@> $(CERTSubject $&{cert_subject} $)', `RSUBJECT $: <@> $&{cert_subject}') R<@> $+ $: <@> $(access CERTSUBJECT`'_TAG_DELIM_`'$1 $) R<@> RELAY $# RELAY R$* $: NO', `dnl') ###################################################################### ### authinfo: lookup authinfo in the access map ### ### Parameters: ### $1: {server_name} ### $2: {server_addr} dnl both are currently ignored dnl if it should be done via another map, we either need to restrict dnl functionality (it calls D and A) or copy those rulesets (or add another dnl parameter which I want to avoid, it's quite complex already) ###################################################################### dnl omit this ruleset if neither is defined? dnl it causes DefaultAuthInfo to be ignored dnl (which may be considered a good thing). Sauthinfo ifdef(`_AUTHINFO_TABLE_', `dnl R$* $: <$(authinfo AuthInfo:$&{server_name} $: ? $)> R $: <$(authinfo AuthInfo:$&{server_addr} $: ? $)> R $: <$(authinfo AuthInfo: $: ? $)> R $@ no no authinfo available R<$*> $# $1 dnl', `dnl ifdef(`_ACCESS_TABLE_', `dnl R$* $: $1 $| $>D <$&{server_name}> <> R$* $| $* $: $1 $| $>A <$&{server_addr}> <> R$* $| $* $: $1 $| <$(access AuthInfo`'_TAG_DELIM_ $: ? $)> <> R$* $| $* $@ no no authinfo available R$* $| <$*> <> $# $2 dnl', `dnl')') ifdef(`_RATE_CONTROL_',`dnl ###################################################################### ### RateControl: ### Parameters: ignored ### return: $#error or OK ###################################################################### SRateControl ifdef(`_ACCESS_TABLE_', `dnl R$* $: dnl also look up a default value via E: R$+ $: $>SearchList $| $1 <> dnl found nothing: stop here R $@ OK ifdef(`_ATMPF_', `dnl tempfail? R<$* _ATMPF_> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl use the generic routine (for now) R<0> $@ OK no limit R<$+> $: <$1> $| $(arith l $@ $1 $@ $&{client_rate} $) dnl log this? Connection rate $&{client_rate} exceeds limit $1. R<$+> $| TRUE $#error $@ 4.3.2 $: _RATE_CONTROL_REPLY Connection rate limit exceeded. ')') ifdef(`_CONN_CONTROL_',`dnl ###################################################################### ### ConnControl: ### Parameters: ignored ### return: $#error or OK ###################################################################### SConnControl ifdef(`_ACCESS_TABLE_', `dnl R$* $: dnl also look up a default value via E: R$+ $: $>SearchList $| $1 <> dnl found nothing: stop here R $@ OK ifdef(`_ATMPF_', `dnl tempfail? R<$* _ATMPF_> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."', `dnl') dnl use the generic routine (for now) R<0> $@ OK no limit R<$+> $: <$1> $| $(arith l $@ $1 $@ $&{client_connections} $) dnl log this: Open connections $&{client_connections} exceeds limit $1. R<$+> $| TRUE $#error $@ 4.3.2 $: _CONN_CONTROL_REPLY Too many open connections. ')') undivert(9)dnl LOCAL_RULESETS # ###################################################################### ###################################################################### ##### `##### MAIL FILTER DEFINITIONS' ##### ###################################################################### ###################################################################### _MAIL_FILTERS_ # ###################################################################### ###################################################################### ##### `##### MAILER DEFINITIONS' ##### ###################################################################### ###################################################################### undivert(7)dnl MAILER_DEFINITIONS