Lines Matching +full:broken +full:- +full:save +full:- +full:restore +full:- +full:fw
9 To get started, you may want to look at tcpproto.mc (for TCP-only
11 mail host), or the generic-*.mc files as operating system-specific
30 ANTI-SPAM CONFIGURATION CONTROL
37 NON-SMTP BASED CONFIGURATIONS
51 +--------------------------+
53 +--------------------------+
57 You must pre-load "cf.m4":
70 or the -I flag (ditto), then ${CFDIR} can be in an arbitrary directory.
72 use -D_CF_DIR_=/path/to/cf/dir/ -- note the trailing slash! For example:
74 m4 -D_CF_DIR_=${CFDIR}/ ${CFDIR}/m4/cf.m4 config.mc > config.cf
78 divert(-1)
80 # Copyright (c) 1998-2005 Proofpoint, Inc. and its suppliers.
92 # This is a Berkeley-specific configuration file for HP-UX 9.x.
102 The divert(-1) will delete the crud in the resulting output file.
112 in SMTP greeting messages -- this is defined in m4/version.m4.
154 *** Berkeley-specific assumptions built in, such as the name ***
155 *** of their UUCP-relay. You'll want to create your own ***
181 +----------------------------+
183 +----------------------------+
186 files. The most important thing to know is that M4 is stream-based,
222 -------
224 This package requires a post-V7 version of m4; if you are running the
226 BSD-Net/2's m4 both work. GNU m4 version 1.1 or later also works.
227 Unfortunately, the M4 on BSDI 1.0 doesn't work -- you'll have to use a
229 ftp://ftp.gnu.org/pub/gnu/m4/m4-1.4.tar.gz (check for the latest version).
230 EXCEPTIONS: DEC's m4 on Digital UNIX 4.x is broken (3.x is fine). Use GNU
234 +----------------+
236 +----------------+
239 related files, /etc/mail. The new files available for sendmail 8.9 --
240 the class {R} /etc/mail/relay-domains and the access database
241 /etc/mail/access -- take advantage of this new directory. Beginning with
243 set by OSTYPE() files). This new directory should help to restore
249 ------------ ------------
265 /etc/sendmail.cw /etc/mail/local-host-names
266 /etc/mail/sendmail.cw /etc/mail/local-host-names
267 /etc/sendmail/sendmail.cw /etc/mail/local-host-names
269 /etc/sendmail.ct /etc/mail/trusted-users
271 /etc/sendmail.oE /etc/mail/error-header
301 +--------+
303 +--------+
317 empty). Unfortunately, the list of configuration-supported systems is
318 not as broad as the list of source-supported systems, since many of
322 of the alias file(s). It can be a comma-separated
324 commas in them -- for example, use
349 LOCAL_MAILER_ARGS [mail -d $u] The arguments passed to deliver local
356 LOCAL_MAILER_CHARSET [undefined] If defined, messages containing 8-bit data
363 [X-Unix] The DSN Diagnostic-Code value for the
368 LOCAL_SHELL_ARGS [sh -c $u] The arguments passed to deliver "prog"
376 USENET_MAILER_ARGS [-m -h -n] The command line arguments for the
385 flags are `mDFMuX' for all SMTP-based mailers; the
389 flags are `mDFMuX' for all SMTP-based mailers; the
416 SMTP_MAILER_CHARSET [undefined] If defined, messages containing 8-bit data
420 RELAY_MAILER_CHARSET [undefined] If defined, messages containing 8-bit data
429 flags are `DFMhuU' (and `m' for uucp-new mailer,
430 minus `U' for uucp-dom mailer).
431 UUCP_MAILER_ARGS [uux - -r -z -a$g -gC $h!rmail ($u)] The arguments
435 UUCP_MAILER_CHARSET [undefined] If defined, messages containing 8-bit data
458 PROCMAIL_MAILER_ARGS [procmail -Y -m $h $f $u] The arguments passed to
474 PH_MAILER_ARGS [phquery -- $u] -- arguments to the phquery mailer.
480 CYRUS_MAILER_ARGS [deliver -e -m $h -- $u] The arguments passed
489 CYRUS_BB_MAILER_ARGS [deliver -e -m $u] The arguments passed
504 CYRUSV2_MAILER_CHARSET [undefined] If defined, messages containing 8-bit data
514 QPAGE_MAILER_ARGS [qpage -l0 -m -P$u] The arguments passed
525 (thus overriding the default value), or if it starts with `+' (`-')
539 +---------+
541 +---------+
543 You will probably want to collect domain-dependent defines into one
548 UUCP_RELAY The host that will accept UUCP-addressed email.
551 BITNET_RELAY The host that will accept BITNET-addressed email.
552 If not defined, the .BITNET pseudo-domain won't work.
553 DECNET_RELAY The host that will accept DECNET-addressed email.
554 If not defined, the .DECNET pseudo-domain and addresses
556 FAX_RELAY The host that will accept mail to the .FAX pseudo-domain.
558 LOCAL_RELAY The site that will handle unqualified names -- that
562 FEATURE(`stickyhost') -- see the discussion of
565 central site to store a company- or department-wide
568 LUSER_RELAY The site that will handle lusers -- that is, apparently
574 mailer is the internal mailer name, such as ``uucp-new'' and the hostname
583 (using "DD<domain>") and set certain site-wide features. If all hosts
587 You do not have to define a domain -- in particular, if you are a
593 +---------+
595 +---------+
610 five mailers: "smtp" for regular (old-style) SMTP to
613 converting 8-bit data to MIME (essentially, this is
614 your statement that you know the other end is 8-bit
619 uucp The UNIX-to-UNIX Copy Program mailer. Actually, this
620 defines two mailers, "uucp-old" (a.k.a. "uucp") and
621 "uucp-new" (a.k.a. "suucp"). The latter is for when you
625 ("uucp-dom" and "uucp-uudom") are also defined [warning: you
628 class {U} and sends them to the uucp-old mailer; all
629 names in class {Y} are sent to uucp-new; and all
630 names in class {Z} are sent to uucp-uudom. Note that
659 ! -oi -f $1 person@other.host
668 problem, e.g., a catch-all entry in a virtusertable.
686 permits. The cyrusbb mailer delivers to a system-wide
709 +----------+
711 +----------+
718 tells sendmail that you want to have it read an /etc/mail/local-host-names
720 optional parameters -- for example:
741 use_cw_file Read the file /etc/mail/local-host-names file to get
749 use_ct_file Read the file /etc/mail/trusted-users file to get the
751 set their envelope from address using -f without generating
766 Warnings: 1. See the notice in the anti-spam section.
776 Warnings: 1. See the notice in the anti-spam section.
792 "define(`confBIND_OPTS', `-DNSRCH -DEFNAMES')" to turn off
821 "user@local.host" are marked as "sticky" -- that
842 or partial domains preceded by a dot -- for example,
854 will forward to the original user in the e-mail address
997 virtusertable A domain-specific form of aliasing, allowing multiple
1001 info@foo.com foo-info
1002 info@bar.com bar-info
1008 address foo-info, mail addressed to info@bar.com will be
1009 delivered to bar-info, and mail addressed to anyone at baz.org
1033 There are two wildcards after "+": "+" matches only a non-empty
1062 ldap_routing Implement LDAP-based e-mail recipient routing according to
1063 the Internet Draft draft-lachman-laser-ldap-mail-routing-01.
1064 This provides a method to re-route addresses with a
1073 nullclient This is a special case -- it creates a configuration file
1075 central hub via a local SMTP-based network. The argument
1087 confEBINDIR m4 variable -- making the default
1107 is just tossed, but by default it is passed as the -a
1115 [default: procmail -Y -a $h -d $u]
1119 Note that if you are on a system with a broken
1120 setreuid() call, you may need to add -f $f to the procmail
1127 `maildrop -d $u')
1141 these domains -- this will reduce unnecessary DNS
1150 e-mail. If an argument is provided it is used as the
1152 confEBINDIR is used for the smrsh binary -- by default,
1193 if route address syntax (or %-hack syntax) is used. If
1194 this is a problem, add entries to the access-table or use
1207 anti-spam configuration control.
1246 hash -T<TMPF> /etc/mail/access
1248 See the anti-spam configuration control section for further
1250 "-T<TMPF>" is meant literal, do not replace it by anything.
1258 described in the anti-spam configuration control section
1265 See "Delay all checks" in the anti-spam configuration control
1289 Rejected: IP-ADDRESS listed at SERVER
1291 where IP-ADDRESS and SERVER are replaced by the appropriate
1295 message. See the anti-spam configuration control section for
1311 define(`DNSBL_MAP', `dns -R A')
1318 define(`DNSBL_MAP', `dns -R A -r2')
1333 will reject the e-mail if the lookup returns the value
1394 draft-stumpf-dns-mtamark-01. Optional arguments are:
1451 with the Compat: tag -- Compat:sender<@>recipient -- in the
1468 e-mails to. Note that MX records will be used if the
1493 on the full e-mail address or the domain of the
1539 - authenticated sessions,
1540 - connections from IP addresses in class $={R}.
1559 If the look-up succeeds, but returns an apparently forged
1566 Any IP address matched using $=R (the "relay-domains" file)
1614 (MTA-STS, see RFC 8461). It sets the option
1617 postfix-mta-sts-resolver (see feature/sts.m4
1627 +-------+
1629 +-------+
1633 macro. These will tend to be site-dependent. The release
1634 includes the Berkeley-dependent "cssubdomain" hack (that makes
1636 this is intended as a short-term aid while moving hosts into
1640 +--------------------+
1642 +--------------------+
1649 * of UUCP mailers, such as uucp-uudom. *
1656 The SITECONFIG macro allows you to indirectly reference site-dependent
1676 out-of-date configuration file has been left around to demonstrate
1700 +--------------------+
1702 +--------------------+
1706 for domain-based addressing, even for UUCP sites.
1718 non-domainized scheme. This depends entirely on what the other
1720 other end to go to a domain-based system -- non-domainized addresses
1725 uucp-old (obsolete name: "uucp")
1734 uucp-new (obsolete name: "suucp")
1739 uucp-dom
1747 domain-based addresses in the message header. (The envelope
1750 uucp-uudom
1751 This is a cross between uucp-new (for the envelope addresses)
1752 and uucp-dom (for the header addresses). It bangifies the
1762 On host grasp.insa-lyon.fr (UUCP host name "grasp"), the following
1766 ------ ------ -------------------------
1767 uucp-{old,new} wolf grasp!wolf
1768 uucp-dom wolf wolf@grasp.insa-lyon.fr
1769 uucp-uudom wolf grasp.insa-lyon.fr!wolf
1771 uucp-{old,new} wolf@fr.net grasp!fr.net!wolf
1772 uucp-dom wolf@fr.net wolf@fr.net
1773 uucp-uudom wolf@fr.net fr.net!wolf
1775 uucp-{old,new} somehost!wolf grasp!somehost!wolf
1776 uucp-dom somehost!wolf somehost!wolf@grasp.insa-lyon.fr
1777 uucp-uudom somehost!wolf grasp.insa-lyon.fr!somehost!wolf
1780 to convert all UUCP addresses to domain format -- otherwise, it will
1789 +-------------------+
1791 +-------------------+
1836 Kyplocal nis -m hosts.byname
1839 +---------------------------+
1841 +---------------------------+
1870 This can be a space-separated list of names.
1894 There are always users that need to be "exposed" -- that is, their
1967 need to unset all the other relays -- or better yet, find or build a
1974 note the trailing dot ---^
1977 +-------------------------------------------+
1979 +-------------------------------------------+
1982 own LDAP map specification or using the built-in default LDAP map
1983 specification. The built-in default specifications all provide lookups
2006 in future versions. Feedback via sendmail-YYYY@support.sendmail.org is
2009 -------
2011 -------
2021 ldap -k (&(objectClass=sendmailMTAAliasObject)
2026 …-v sendmailMTAAliasValue,sendmailMTAAliasSearch:FILTER:sendmailMTAAliasObject,sendmailMTAAliasURL:…
2031 not actually macro-expanded when read from the sendmail.cf file.
2035 dn: sendmailMTAKey=sendmail-list, dc=sendmail, dc=org
2041 sendmailMTAKey: sendmail-list
2046 dn: sendmailMTAKey=owner-sendmail-list, dc=sendmail, dc=org
2052 sendmailMTAKey: owner-sendmail-list
2064 Here, the aliases sendmail-list and owner-sendmail-list will be available
2095 define(`ALIAS_FILE', `ldap:-k (&(objectClass=mailGroup)(mail=%0)) -v mgrpRFC822MailMember')
2097 ----
2099 ----
2116 --------- ------------------
2128 Kmailertable ldap -k (&(objectClass=sendmailMTAMapObject)
2133 …-1 -v sendmailMTAMapValue,sendmailMTAMapSearch:FILTER:sendmailMTAMapObject,sendmailMTAMapURL:URL:s…
2173 FEATURE(`access_db', `ldap:-1 -k (&(objectClass=mapDatabase)(key=%0)) -v value')
2175 -------
2177 -------
2196 F{R}@ldap:-k (&(objectClass=sendmailMTAClass)
2200 …-v sendmailMTAClassValue,sendmailMTAClassSearch:FILTER:sendmailMTAClass,sendmailMTAClassURL:URL:se…
2204 not actually macro-expanded when read from the sendmail.cf file.
2210 ------- --------------------
2257 VIRTUSER_DOMAIN_FILE(`@ldap:-k (&(objectClass=virtHosts)(host=*)) -v host')
2263 +--------------+
2265 +--------------+
2269 (draft-lachman-laser-ldap-mail-routing-01). This feature enables
2270 LDAP-based rerouting of a particular address to either a different host
2303 contains +detail information -- `strip' tries the lookup with the +detail
2315 ldap -1 -T<TMPF> -v mailHost -k (&(objectClass=inetLocalMailRecipient)
2320 ldap -1 -T<TMPF> -v mailRoutingAddress
2321 -k (&(objectClass=inetLocalMailRecipient)
2324 Note that neither includes the LDAP server hostname (-h server) or base DN
2325 (-b o=org,c=COUNTRY), both necessary for LDAP queries. It is presumed that
2328 changed as described above. The "-T<TMPF>" is required in any user
2335 ----------- --------------------- ----------
2408 +---------------------------------+
2409 | ANTI-SPAM CONFIGURATION CONTROL |
2410 +---------------------------------+
2412 The primary anti-spam features available in sendmail are:
2506 anti-relay rules do not prevent: the case of a system that does use
2516 allows UUCP (bang-format) / %-hack addresses, all systems from which
2568 FEATURE(`access_db', `hash -T<TMPF> /etc/mail/access_map')
2571 `-T<TMPF>' as shown above. The optional parameters may be
2579 e-mail address instead of an entire domain.
2587 The table itself uses e-mail addresses, domain names, and network
2783 Rejected: IP-ADDRESS listed at SERVER
2785 where IP-ADDRESS and SERVER are replaced by the appropriate
2805 451 Temporary lookup failure of IP-ADDRESS at SERVER
2807 where IP-ADDRESS and SERVER are replaced by the appropriate
2836 Kallnumbers regex -a@MATCH ^[0-9]+$
2855 ----------------
2871 in the access map, then any e-mail with a sender address of
2921 -------------
2926 a Message-ID: header:
2929 HMessage-Id: $>CheckMessageId
2961 any final header-related checks. The ruleset is called with the number of
2963 example usage is to reject messages which do not have a Message-Id:
2964 header. However, the Message-Id: header is *NOT* a required header and is
2970 HMessage-Id: $>CheckMessageId
2984 # Has a Message-Id: header
2986 # Allow missing Message-Id: from local mail
2994 +--------------------+
2996 +--------------------+
3025 +----------+
3027 +----------+
3056 ${cipher} the cipher used for the connection, e.g., EDH-DSS-DES-CBC3-SHA,
3057 EDH-RSA-DES-CBC-SHA, DES-CBC-MD5, DES-CBC3-SHA.
3077 --------
3092 rulesets and map lookups, they are modified as follows: each non-printable
3145 --------------------
3165 requiring that e-mail is sent to a server only encrypted, e.g., via
3169 doesn't necessarily mean that e-mail sent to that domain is encrypted.
3200 algorithm, e.g., DIGEST-MD5.
3213 Example: e-mail sent to secure.example.com should only use an encrypted
3214 connection. E-mail received from hosts within the laptop.example.com domain
3216 receives e-mail for darth@endmail.org must present a cert that uses the
3217 CN smtp.endmail.org. E-mail sent to safe.example.com must be verified,
3230 -----------------------
3243 - Options: compare {Server,Client}SSLOptions.
3244 - CipherList: same as the global option.
3245 - CertFile, KeyFile: {Server,Client}{Cert,Key}File
3246 - Flags: see doc/op/op.me for details.
3254 TLS_Clt_features:10.1.0.1 Options=SSL_OP_NO_TLSv1_2; CipherList=ALL:-EXPORT
3273 Try_TLS:broken.server NO
3276 Clt_Features:broken.sts M
3278 will turn off STARTTLS when sending to broken.server (or any host
3280 only for hosts in my.domain, and disable MTA-STS for broken.sts.
3286 ----------------
3294 +---------------------+
3296 +---------------------+
3299 used in anti-relay rulesets to allow relaying for those users that
3312 RDIGEST-MD5 $| $+@$=w $# OK
3314 to allow relaying for users that authenticated using DIGEST-MD5
3329 TRUST_AUTH_MECH(`KERBEROS_V4 DIGEST-MD5')
3336 -----------------------------------------------------
3352 sendmail set-user-ID. Use PrivacyOptions to turn off verbose output
3374 AuthInfo:other.dom "U:user" "I:user" "P:secret" "R:other.dom" "M:DIGEST-MD5"
3387 group/world-unreadable, this is left to the user.
3390 +--------------------------------+
3392 +--------------------------------+
3419 +-------------------------+
3421 +-------------------------+
3462 +-------------------------+
3464 +-------------------------+
3476 +-------------------------------+
3477 | NON-SMTP BASED CONFIGURATIONS |
3478 +-------------------------------+
3481 SMTP-based sites. They may not be well tuned for UUCP-only or
3482 UUCP-primarily nodes (the latter is defined as a small local net
3494 If you are on a local SMTP-based net that connects to the outside
3498 define(`SMART_HOST', `uucp-new:uunet')
3503 via SMTP; anything else will be sent via uucp-new (smart UUCP) to uunet.
3516 You may need to turn off the anti-spam rules in order to accept
3521 +-----------+
3523 +-----------+
3539 +-----------------------------------+
3541 +-----------------------------------+
3547 file /etc/mail/local-host-names containing a list of your aliases (one per
3549 ``LOCAL_DOMAIN(`alias.host.name')''. Be sure you use the fully-qualified
3554 http://www.sendmail.org/virtual-hosting.html
3557 +--------------------+
3559 +--------------------+
3566 uuhost1.my.domain uucp-new:uuhost1
3577 the leading dot) -- that is, they can be thought of as having a
3578 leading ".+" regular expression pattern for a non-empty sequence of
3579 characters. Matching is done in order of most-to-least qualified
3580 -- for example, even though ".my.domain" is listed first in the
3582 entry since it is more explicit. Note: e-mail to "user@my.domain"
3591 that mailer. In domain-based matches (that is, those with leading
3615 +--------------------------------+
3617 +--------------------------------+
3622 purpose instead -- since you can specify multiple alias files, this
3627 imperative that you not use FEATURE(`stickyhost') -- otherwise,
3628 e-mail sent to Full.Name@local.host.name will be rejected.
3635 as e-mail addresses, since they are not in any sense unique. For
3636 example, the UNIX software-development community has at least two
3637 well-known Peter Deutsches, and at one time Bell Labs had two
3646 +--------------------------------+
3648 +--------------------------------+
3666 +----------------+
3668 +----------------+
3683 if your system allows "file giveaways" (that is, if a non-root
3688 to steal anyone else's e-mail. Instead, create a script that
3690 night (if you want the non-NFS-mounted forward directory).
3693 sendmail is much less trusting of :include: files -- in
3698 In general, file giveaways are a mistake -- if you can turn them
3702 +--------------------------------+
3704 +--------------------------------+
3719 Some options are likely to be deprecated in future versions -- that is,
3720 the option is only included to provide back-compatibility. These are
3731 confMAILER_NAME $n macro [MAILER-DAEMON] The sender name used
3758 confMESSAGEID_HEADER Message-Id: [<$t.$i@$j>] The format of an
3759 internally generated Message-Id:
3761 confCW_FILE Fw class [/etc/mail/local-host-names] Name
3765 confCT_FILE Ft class [/etc/mail/trusted-users] Name of
3768 confCR_FILE FR class [/etc/mail/relay-domains] Name of
3779 confSMTP_MAILER - [esmtp] The mailer name used when
3783 confUUCP_MAILER - [uucp-old] The mailer to be used by
3784 default for bang-format recipient
3788 confLOCAL_MAILER - [local] The mailer name used when
3791 confRELAY_MAILER - [relay] The default mailer name used
3795 "uucp-new" if you are on a
3796 UUCP-connected site.
3798 confEIGHT_BIT_HANDLING EightBitMode [pass8] 8-bit data handling
3822 confSAVE_FROM_LINES SaveFromLine Save extra leading From_ lines.
3826 confIGNORE_DOTS* IgnoreDots [False; always False in -bs or -bd
3831 confMIME_FORMAT_ERRORS* SendMimeErrors [True] Send error messages as MIME-
3834 The colon-separated list of places to
3866 confUSE_ERRORS_TO* UseErrorsTo [False] Use the Errors-To: header to
3886 confQUEUE_FACTOR QueueFactor [600000] Slope of queue-only function.
3892 confDONT_PRUNE_ROUTES DontPruneRoutes [False] Don't prune down route-addr
3967 Timeout.queuereturn.non-urgent
3968 [undefined] As above, for non-urgent
3986 Timeout.queuewarn.non-urgent
3987 [undefined] As above, for non-urgent
4032 confTIME_ZONE TimeZoneSpec [USE_SYSTEM] Time zone info -- can be
4053 queue-only function kicks in.
4117 confDEF_CHAR_SET DefaultCharSet [unknown-8bit] When converting
4124 system-defined switch.
4137 nonconforming message as is, "add-to"
4140 blind recipients), "add-apparently-to"
4141 to do the same but use Apparently-To:
4144 "add-bcc" to add an empty Bcc:
4145 header, or "add-to-undisclosed" to
4147 ``To: undisclosed-recipients:;''.
4157 handled properly in route-addrs. This
4226 [True] If set, group-writable
4230 from such files. World-writable files
4253 confDEAD_LETTER_DROP DeadLetterDrop [undefined] Filename to save bounce
4258 confRRT_IMPLIES_DSN RrtImpliesDsn [False] Return-Receipt-To: header
4286 in a mailertable entry) -- otherwise,
4303 confREJECT_MSG - [550 Access denied] The message
4306 confRELAY_MSG - [550 Relaying denied] The message
4311 memory-buffered data (df) file
4312 before a disk-based file is used.
4315 memory-buffered transcript (xf)
4316 file before a disk-based file is
4318 confAUTH_MECHANISMS AuthMechanisms [EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5
4319 CRAM-MD5] List of authentication
4373 specific settings such as "-h host
4374 -p port -d bindDN", etc. The
4455 confDEQUOTE_OPTS - [empty] Additional options for the
4545 DAEMON_OPTIONS(`Name=MTA-v4, Family=inet')
4546 DAEMON_OPTIONS(`Name=MTA-v6, Family=inet6')
4573 +----------------------------+
4575 +----------------------------+
4586 - confTRUSTED_USERS, FEATURE(`use_ct_file'), and confCT_FILE for
4587 avoiding X-Authentication warnings.
4588 - confTIME_ZONE to change it from the default `USE_TZ'.
4589 - confDELIVERY_MODE is set to interactive in msp.m4 instead
4591 - FEATURE(stickyhost) and LOCAL_RELAY to send unqualified addresses
4593 - confRAND_FILE if you use STARTTLS and sendmail is not compiled with
4625 FEATURE(`authinfo', `DATABASE_MAP_TYPE /etc/mail/msp-authinfo')
4627 /etc/mail/msp-authinfo should contain an entry like:
4629 AuthInfo:127.0.0.1 "U:smmsp" "P:secret" "M:DIGEST-MD5"
4644 the MSP with debug options or even with -v. For that reason either
4646 AUTH dialogue (e.g., DIGEST-MD5) or a different authentication
4663 +--------------------------+
4665 +--------------------------+
4669 /etc/mail/local-host-names may have the following content:
4684 By default, the delimiter between LHS and RHS is a non-empty sequence
4688 +------------------+
4690 +------------------+
4728 siteconfig Site configuration -- e.g., tables of locally connected
4732 +------------------------+
4734 +------------------------+
4767 2 uucp-* UNIX-to-UNIX Copy Program
4778 D The local domain -- usually not needed
4820 P top level pseudo-domains: BITNET, DECNET, FAX, UUCP, etc.
4822 R domains this system is willing to relay (pass anti-spam filters)
4830 Z locally connected domain-ized UUCP hosts