1<html> 2<head><title>Installation and Configuration</title> 3</head> 4<body> 5<h1>Installation</h1> 6<h2>Contents</h2> 7<ul> 8 <li><a href="#compile">Compiling and Installing Your Filter</a> 9 <li><a href="#config">Configuring Sendmail</a> 10</ul> 11 12<h2><a name="compile">Compiling and Installing Your Filter</A></h2> 13 14To compile a filter, modify the Makefile provided with the sample program, or: 15<ul> 16 <li>Put the include and Sendmail directories in your include path 17 (e.g. -I/path/to/include -I/path/to/sendmail). 18 19 <li>Make sure libmilter.so is in your library path, and link your 20 application with it (e.g. "-lmilter"). 21 22 <li>Compile with pthreads, either by using -pthread for gcc, or 23 linking with a pthreads support library (-lpthread). 24</ul> 25Your compile command line will look like 26<pre> 27cc -I/path/to/include -I/path/to/sendmail -c myfile.c 28</pre> 29and your linking command line will look something like 30<pre> 31cc -o myfilter [object-files] -L[library-location] -lmilter -pthread 32</pre> 33 34<p> 35To run the filter, the Milter shared library must be available to the 36run-time linker. 37 38<H2><a name="config">Configuring Sendmail</A></H2> 39 40First, you must compile sendmail versions before 8.12 with _FFR_MILTER 41defined. To do this, add the following lines to your build 42configuration file (devtools/Site/config.site.m4) 43<pre> 44APPENDDEF(`conf_sendmail_ENVDEF', `-D_FFR_MILTER=1') 45APPENDDEF(`conf_libmilter_ENVDEF', `-D_FFR_MILTER=1') 46</pre> 47 48then type <code>./Build -c</code> in your sendmail directory. 49 50<P> 51Next, you must add the desired filters to your sendmail configuration 52(.mc) file. With versions before 8.12, the file must then be 53processed with _FFR_MILTER defined. Mail filters have three equates: 54The required <code>S=</code> equate specifies the socket where 55sendmail should look for the filter; The optional <code>F=</code> and 56<code>T=</code> equates specify flags and timeouts, respectively. All 57equates names, equate field names, and flag values are case sensitive. 58 59<P> 60The current flags (<code>F=</code>) are: 61<p> 62<table cellspacing="1" cellpadding=4 border=1> 63<tr bgcolor="#dddddd" align=left valign=top> 64<th>Flag</TH> <th align="center">Meaning</TH> 65</TR> 66<tr align="left" valign=top> 67<TD>R</TD> <TD>Reject connection if filter unavailable</TD> 68</TR> 69<tr align="left" valign=top> 70<TD>T</TD> <TD>Temporary fail connection if filter unavailable</TD> 71</TR> 72</TABLE> 73 74If a filter is unavailable or unresponsive and no flags have been 75specified, the MTA will continue normal handling of the current 76connection. The MTA will try to contact the filter again on each new 77connection. 78 79<P> 80There are three fields inside of the <code>T=</code> equate: S, R, and 81E. Note the separator between each is a ";" (semicolon), as "," 82(comma) already separates equates. The value of each field is a 83decimal number followed by a single letter designating the units ("s" 84for seconds, "m" for minutes). The fields have the following 85meanings: 86<p> 87<TABLE cellspacing="1" cellpadding=4 border=1> 88<TR bgcolor="#dddddd" align=left valign=top> 89<TH>Flag</TH> <TH align="center">Meaning</TH> 90</TR> 91<TR align="left" valign=top> 92<TD>C</TD> <TD>Timeout for connecting to a filter. If set to 0, the 93 system's <CODE>connect()</CODE> timeout will be used. 94 Default: 5m</TD> 95</TR> 96<TR align="left" valign=top> 97<TD>S</TD> <TD>Timeout for sending information from the MTA to a 98 filter. Default: 10s</TD> 99</TR> 100<TR align="left" valign=top> 101<TD>R</TD> <TD>Timeout for reading reply from the filter. Default: 10s</TD> 102</TR> 103<TR align="left" valign=top> 104<TD>E</TD> <TD>Overall timeout between sending end-of-message to 105 filter and waiting for the final acknowledgment. Default: 5m</TD> 106</TR> 107</TABLE> 108 109<p> 110The following sendmail.mc example specifies three filters. The first 111two rendezvous on Unix-domain sockets in the /var/run directory; the 112third uses an IP socket on port 999. 113<pre> 114 INPUT_MAIL_FILTER(`filter1', `S=unix:/var/run/f1.sock, F=R') 115 INPUT_MAIL_FILTER(`filter2', `S=unix:/var/run/f2.sock, F=T, T=S:1s;R:1s;E:5m') 116 INPUT_MAIL_FILTER(`filter3', `S=inet:999@localhost, T=C:2m') 117 118 define(`confINPUT_MAIL_FILTERS', `filter2,filter1,filter3') 119<hr width="30%"> 120 m4 <b>-D_FFR_MILTER</b> ../m4/cf.m4 myconfig.mc > myconfig.cf 121</pre> 122By default, the filters would be run in the order declared, 123i.e. "filter1, filter2, filter3"; however, since 124<code>confINPUT_MAIL_FILTERS</code> is defined, the filters will be 125run "filter2, filter1, filter3". Also note that a filter can be 126defined without adding it to the input filter list by using 127MAIL_FILTER() instead of INPUT_MAIL_FILTER(). 128 129<p> 130The above macros will result in the following lines being added to 131your .cf file: 132<PRE> 133 Xfilter1, S=unix:/var/run/f1.sock, F=R 134 Xfilter2, S=unix:/var/run/f2.sock, F=T, T=S:1s;R:1s;E:5m 135 Xfilter3, S=inet:999@localhost, T=C:2m 136 137 O InputMailFilters=filter2,filter1,filter3 138</PRE> 139<p> 140Finally, the sendmail macros accessible via <a 141href="smfi_getsymval.html">smfi_getsymval</a> can be configured by 142defining the following m4 variables (or cf options): 143<table cellspacing="1" cellpadding=4 border=1> 144<tr bgcolor="#dddddd" align=left valign=top> 145<th align="center">In .mc file</th> <th align="center">In .cf file</TH> 146<th align="center">Default Value</th> 147</tr> 148<tr><td>confMILTER_MACROS_CONNECT</td><td>Milter.macros.connect</td> 149<td><code>j, _, {daemon_name}, {if_name}, {if_addr}</code></td></tr> 150<tr><td>confMILTER_MACROS_HELO</td><td>Milter.macros.helo</td> 151<td><code>{tls_version}, {cipher}, {cipher_bits}, {cert_subject}, 152{cert_issuer}</code></td></tr> 153<tr><td>confMILTER_MACROS_ENVFROM</td><td>Milter.macros.envfrom</td> 154<td><code>i, {auth_type}, {auth_authen}, {auth_ssf}, {auth_author}, 155{mail_mailer}, {mail_host}, {mail_addr}</code></td></tr> 156<tr><td>confMILTER_MACROS_ENVRCPT</td><td>Milter.macros.envrcpt</td> 157<td><code>{rcpt_mailer}, {rcpt_host}, {rcpt_addr}</code></td></tr> 158</table> 159For information about available macros and their meanings, please 160consult the sendmail documentation. 161<hr size="1"> 162<font size="-1"> 163Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. 164All rights reserved. 165<br> 166By using this file, you agree to the terms and conditions set 167forth in the <a href="LICENSE.txt">LICENSE</a>. 168</font> 169</body> </html> 170