SnertSoft: We Serve Your Server

milter-report/0.13
«Surprise! Surprise! Surprise!»
- Gomer


Description & Usage ° Installation & Notes ° License & Support

Description

This Sendmail utility milter records all sender & recipient pairs that are rejected. It will then periodically email a report to those recipients with a list of senders that were blocked for some reason. When a sender is rejected without a recipient being specified, then the local <postmaster> will be sent a report.

Usage

milter-report [options ...][arguments ...]

Options can be expressed in four different ways. Boolean options are expressed as +option or -option to turn the option on or off respectively. Options that required a value are expressed as option=value or option+=value for appending to a value list. Note that the +option and -option syntax are equivalent to option=1 and option=0 respectively. Option names are case insensitive.

Some options, like +help or -help, are treated as immediate actions or commands. Unknown options are ignored. The first command-line argument is that which does not adhere to the above option syntax. The special command-line argument -- can be used to explicitly signal an end to the list of options.

The default options, as shown below, can be altered by specifying them on the command-line or within an option file, which simply contains command-line options one or more per line and/or on multiple lines. Comments are allowed and are denoted by a line starting with a hash (#) character. If the file option is defined and not empty, then it is parsed first followed by the command-line options.

Note that there may be additional options that are listed in the option summary given by +help or -help that are not described here.

cache-file=/var/db/milter-limit.db
The file path used for BDB or flatfile cache types.
cache-gc-frequency=250
This option specifies the cache garbage collection frequency, which is based on the number of SMTP connections (not messages) handled by the milter. Every N connections, the cache is traversed to remove expired entries.
cache-type=bdb
The cache type can be one of: bdb, flatfile, hash.
+daemon
Start as a background daemon or foreground application.
file=/etc/mail/milter-report.cf
Read the option file before command line options. This option is set by default. To disable the use of an option file, simply say file=''
-help or +help
Write the option summary to standard output and exit. The output is suitable for use as an option file.
milter-socket=unix:/var/run/milter/milter-report.socket
A socket specifier used to communicate between Sendmail and milter-report. Typically a unix named socket or a host:port. This value must match the value specified for the INPUT_MAIL_FILTER() macro in the sendmail.mc file. The accepted syntax is:
{unix|local}:/path/to/file
A named pipe. (default)
inet:port@{hostname|ip-address}
An IPV4 socket.
inet6:port@{hostname|ip-address}
An IPV6 socket.
milter-timeout=7210
The sendmail/milter I/O timeout in seconds.
postmaster-report=unknown
Specify what reports <postmaster> should receive. report can be one of the following words:
none do not send any reports to <postmaster>
unknown send only for unknown recipients
copy send a copy of all reports
redirect redirect all reports to <postmaster>
pid-file=/var/run/milter/milter-report.pid
The file path of where to save the process-id.
-quit or +quit
Quit an already running instance of the milter and exit. This is equivalent to: kill -QUIT `cat /var/run/milter/milter-report.pid`
report-at=hhmm[,hhmm...]
Specify daily report times in 24-hour clock as HHMM. The default is "0500,1700".
-restart or +restart
Terminate an already running instance of the milter before starting.
run-group=milter
The process runtime group name to be used when started by root.
run-user=milter
The process runtime user name to be used when started by root.
verbose=info
A comma separated list of how much detail to write to the mail log. Those mark with § have meaning for this milter.
§ all All messages
§ 0 Log nothing.
§ info General info messages. (default)
§ trace Trace progress through the milter.
§ parse Details from parsing addresses or special strings.
§ debug Lots of debug messages.
  dialog I/O from Communications dialog
  state State transitions of message body scanner.
  dns Trace & debug of DNS operations
§ cache Cache get/put/gc operations.
§ database Sendmail database lookups.
  socket-fd Socket open & close calls
  socket-all All socket operations & I/O
§ libmilter libmilter engine diagnostics
work-dir=/var/tmp
The working directory of the process. Normally serves no purpose unless the kernel option that permits daemon process core dumps is set.

SMTP Responses

This is the list of possible SMTP responses.

553 5.1.0 imbalanced angle brackets in path
The path given for a MAIL or RCPT command is missing a closing angle bracket
553 5.1.0 address does not conform to RFC 2821 syntax
The address is missing the angle brackets, < and >, as required by the RFC grammar.
553 5.1.0 local-part too long
The stuff before the @ is too long.
553 5.1.[37] invalid local part
The stuff before the @ sign contains unacceptable characters.
553 5.1.0 domain name too long
The stuff after the @ is too long.
553 5.1.7 address incomplete
Expecting a domain.tld after the @ sign and found none.
553 5.1.[37] invalid domain name
The domain after the @ sign contains unacceptable characters.

Installation

  1. Download:

    milter-report/0.13 md5sum Change Log
    LibSnert md5sum Change Log
    Sendmail 8.13   http://www.sendmail.org/
    Berkeley DB   http://www.sleepycat.com/
  2. If you have never built a milter for Sendmail, then please make sure that you build and install libmilter, which is not built by default when you build Sendmail. Please read the libmilter documentation. Briefly, it should be something like this:

    cd (path to)/sendmail-8.13.4/libmilter
    sh Build -c install
    
  3. The build process for libsnert and milter-report is pretty straight forward once you have libmilter installed:

    cd (path to)/com/snert/src/lib
    ./configure
    make build
    cd ../milter-report
    ./configure
    make build
    make install
    

    Both configuration scripts have some options that allow you to override defaults. Those options are listed with:

    ./configure --help
    
  4. An example ${prefix}/share/examples/milter-report/milter-report.mc is supplied. This file should be reviewed and the necessary elements inserted into your Sendmail .mc file and sendmail.cf rebuilt. Please note the comments on the general milter flags.

    
    
  5. Once installed and configured, start milter-report and then restart Sendmail. An example startup script is provided in ${prefix}/share/examples/milter-report/milter-report.sh. The default options can be altered by specifying them on the command-line or within a /etc/mail/milter-report.cf. The milter-report.cf is parsed first followed by the command-line options.

Notes

  • Currently tested platforms:

    Cobalt Qube 1 with Linux RH 5.1 (mips 2.0.34 kernel); Linux RH 5.1 (Intel x386 2.2.25 kernel); FreeBSD 4.8, 4.9 (Intel x386); OpenBSD 3.6 (Intel x386)
  • For best and more acturate reports, this milter works best with FEATURE(`delay_checks') enabled.

  • The minimum desired file ownership and permissions are as follows for a typical Linux system. For FreeBSD, NetBSD, and OpenBSD the binary and cache locations may differ, but have the same permissions.

    Process user ``milter'' is primary member of group ``milter'' and secondary member of group ``smmsp''. Note that the milter should be started as root, so that it can create a .pid file and .socket file in /var/run; after which it will switch process ownership to milter:milter before starting the accept socket thread.

    /etc/mail/root:smmsp0750 drwxr-x---
    /etc/mail/access.dbroot:smmsp0640 -rw-r-----
    /etc/mail/sendmail.cfroot:smmsp0640 -rw-r-----
    /etc/mail/milter-report.cfroot:root0644 -rw-r--r--
    /var/run/milter/milter-report.pidmilter:milter0644 -rw-r--r--
    /var/run/milter/milter-report.socketmilter:milter0644 srw-r--r--
    /var/db/milter-reportmilter:milter0644 -rw-r--r-- (*BSD)
    /var/cache/milter-reportmilter:milter0644 -rw-r--r-- (linux)
    /usr/local/libexec/milter-reportroot:milter0550 -r-xr-x---
  • I would like to express my thanks to Derek Balling for his support at http://www.milter.org/.

License Agreement 1.4

SNERTSOFT IS WILLING TO LICENSE THE SOFTWARE IDENTIFIED ABOVE TO YOU ONLY UPON THE CONDITION THAT YOU ACCEPT ALL OF THE TERMS CONTAINED IN THIS LICENSE AGREEMENT. PLEASE READ THE AGREEMENT CAREFULLY. BY DOWNLOADING OR INSTALLING THIS SOFTWARE, YOU ACCEPT THE TERMS OF THE AGREEMENT.

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Support

Support is only provided for the Author's original Package. Priority support can be purchased. Free support is limited, based on the Author's availability, though enhancements requests and problem reports are welcome. A community mailing list is available; please refer to SnertSoft web site Support area for details.

Gifts

Gifts from the author's Amazon US or Amazon UK wishlist (search by mail address <achowe at snert dot com>) are welcomed for the continued encouragement, moral support, and ego pumping needed to work in foreign non-english speaking lands.

angels dancing since 21 June 2005