Integrated into several varieties of MTA

Wiki MarkupAmavisd-new is a high-performance interface between mailer (message transfer agent - MTA) and one or more content checkers: virus scanners, and/or [SpamAssassin]. It is written entirely in Perl, assuring high reliability, portability and maintainability. It talks to MTA via (E)SMTP or LMTP, or by using helper programs. Best with Postfix, works with Exim, sendmail/milter or with any MTA as a SMTP relay. \[http://www.ijs.si/software/amavisd/\]unmigrated-wiki-markup

[MailScanner] now includes support for [SpamAssassin]. This is "a virus scanner for e-mail designed for use on e-mail gateways. It can also detect a large proportion of unsolicited commercial e-mail (spam) passing through it." \[http://www.sng.ecs.soton.ac.uk/mailscanner/\] MailScanner does an excellent job with file names and types, and can be set to quarantine encrypted .ZIP files and apply normal filename rules and virus scanning inside unencrypted ones.

Another option is to use a filtering SMTP proxy such as spampd. It is typically used to filter the mail between an external-facing MTA instance/relay, and an "internal" MTA instance. Wiki MarkupAnother option is to use a filtering SMTP proxy such as spampd. It is typically used to filter the mail between an external-facing MTA instance/relay, and an "internal" MTA instance. \[http://www.worlddesign.com/index.cfm/rd/mta/spampd.htm\]

Integrated into Sendmail

With Sendmail, Spamassassin can be called for every user by editing /etc/procmailrc . More details at http://www.stearns.org/doc/spamassassin-setup.current.html#sitewide

An alternative is to use the smtp-vilter high-performance content filter using the sendmail milter API which has a backend for Spamassassins spamd. More details at http://www.etc.msys.ch/softwareproducts/unix/smtp-vilter/

Wiki MarkupMIMEDefang, a sendmail milter written by Roaring Penguin Software, filters all e-mail messages sent via SMTP through a sendmail installation, blocking common mail viriiviruses, and now -- – with the help of [SpamAssassin] -- SpamAssassin – spam. "You can use [SpamAssassin] to test for spam, and then all of the MIMEDefang goodies to reject, manipulate or otherwise mangle the message." \[Integrated with the MTA to the level of returning 5xx error codes during the SMTP session, so viruses or detected spam can be rejected at the delivery, which notifies the sender, that the mail was rejected, without generating an additional email message.http://www.roaringpenguinmimedefang.com/mimedefang/\]unmigrated-wiki-markuporg/

spamass-milt \[http://savannah.gnu.org/projects/spamass-milt/\] is a sendmail milter by Georg C. F. Greve, which allows sendmail users to filter spam at the heart of the sendmail message pipeline. It also allows [SpamAssassin] to be used for UUCP sites. If you plan to use this, be sure to read Kevin [McGrail]'s walkthrough at Peregrine Hardware. \[http://www.peregrinehw.com/downloads/SpamAssassin/INSTALL-spamassmilter\].

Wiki Markupmilter-spamd \[http://www.benzedrine.cxch/milter-spamd.html\] is a simple BSD-licensed sendmail milter by Daniel Hartmeier.

Wiki MarkupBSM Development have released [MailCorral] and [SpamCorral] for use on UNIX and Linux systems, mail/spam filtering software using the sendmail milter interface. \[ http://www.bsmdevelopment.com/

Yet Another Sendmail-SpamAssassin Interface Milter, milter-spamc by Snert http://www.snertsoft.com/\]/doc/milter-spamc/

Integrated into Postfix

...

• For Postfix v2.6 or greater, any of the "milter" software listed above can be used.
• Another way to integrate postfix and spamassassin is to use spamd.

...

• See IntegratedSpamdInPostfix. This method supports after-queue filtering only and is not quite as robust or nearly as efficient.
• IntegratePostfixViaSpampd is a more robust and efficient solution, but also a more complex one. It supports before-queue or after-queue filtering.
• IntegratedInPostfixWithAmavis is more complicated still but provides a way to plug in ClamAV virus scanning as well. It supports before-queue or after-queue filtering.

Integrated into Qmail

Use SpamAssassin to reject spam at SMTP time with Simscan. Simscan works natively with Netqmail-1.05, or with vanilla qmail-1.03 with the qmailqueue patch.

SpamAssassin can be integrated into qmail system-wide using qmail-scanner, described in IntegratedInQmailWithQmailScanner.

Since qmail allows users to configure their own delivery options via ~/.qmail files, an alternative option, if you have spamd running and only want to scan mail delivered to local users, is to use ifspamh: see IntegratedInQmailWithIfspamh.

Integrated into Exim

SpamAssassin can be integrated into Exim in three ways:

1. As of Exim 4.50, by compiling Exim using WITH_CONTENT_SCAN=yes (see details, more). As an Exim 4.4x Exiscan-extended ACL condition stack, Exim can reject spam after reading the body, but before Exim acknowledges acceptance of the email. Debian Linux's exim4-daemon-heavy comes with the exiscan patch built in. You can discover its presence in your distro's exim binary directly with the command exim -bV or exim4 -bV; look for the phrase Contains exiscan-acl patch.
2. As an Exim 4.x loadable module or local_scan.c replacement. SA-Exim also allows SpamAssassin to reject spam before its accepted by your MTA. More info at http://www.timj.co.uk/linux/exim.php. On debian this is the default method: install the sa-exim package and edit /etc/exim4/sa-exim.conf to enable it.
3. As an Exim transport.

Then, go to the end of the file, and add this:

spamassassin unix - n n - - pipe user=nobody argv=/path/to/spamc -f -e /path/to/postfix/sendmail -oi -f ${sender} ${recipient}

Then, setup spamd to start with the system, and you are ready to go. If you wish to provide spamassassin preferences, change "user=nobody" to a valid system user, and add .spamassassin into their home directory.

Alternatively, a more complex scheme is to integrate it using Amavis, as described in IntegratedInPostfixWithAmavis.

Integrated into Qmail

Can be integrated via qmail-scanner, an add-on to qmail. Info available at http://qmail-scanner.sourceforge.net/

This is actually quite easy. SA is auto-detected when you install qmail-scanner, and uses the spamd/spamc combo if available. Here is my configure line (sans private data):

$ ./configure --spooldir /var/lib/qmailscan --qmaildir /var/qmail --bindir /var/qmail/bin \
--qmail-queue-binary /var/qmail/bin/qmail-queue  --admin postmaster@example.com --domain example.com \
--notify none --local-domains example1.com,example3.com,some.other.domain.net --silent-viruses auto \
--lang de_DE --debug 1 --unzip 0 --add-dscr-hdrs 0 --archive 1 --redundant no --log-details \
--fix-mime 1  --scanners "verbose_spamassassin" --install 1

Integrated into Exim

[SpamAssassin] can be integrated into \[http://www.exim.org/ Exim\] in three ways:

1. Wiki Markup

   As an \[http://duncanthrax.net/exiscan-acl/ Exiscan\]-extended ACL condition stack, Exim can reject spam after reading the body, but before Exim acknowledges acceptance of the email. \[http://www.debian.org/ Debian Linux\]'s exim4-daemon-heavy comes with the exiscan patch built in. You can discover its presence in your distro's exim binary directly with the command {{exim -bV}} or {{exim4 -bV}}; look for the phrase {{Contains exiscan-acl patch}}. \\

2. Wiki Markup
   As an Exim 4.x loadable module or local_scan.c replacement. \[http://marc.merlins.org/linux/exim/sa.html SA-Exim\] also allows [SpamAssassin] to reject spam before its accepted by your MTA. \\

3. Wiki MarkupAs an \[http://dman13.dyndns.org/~dman/config_docs/exim-spamassassin/ Exim transport\]. \\ \\

Integrated into Courier-MTA

If you use the Courier MTA, you probably also can use maildrop. If so, you may follow these steps:

First, install SpamAssassin and Courier MTA according to their installation docs. Make sure they are functioning on their own. You may want to use spamc/spamd for better performance. What's left is the connection between Courier and SpamAssassin.

If you have virtual users (as opposed to plain \*nix users), it is vital that you make sure that courier-mta (as well as courier-imap and courier-pop) uses the authdaemon as authentication module. That means that in {{/etc/courier/esmtpd}}, {{imapd}} and {{pop3d}} the variable AUTHMODULES should be set to {{"authdaemon"}}. Keep in mind that your courier config files may be in another directory. The authdaemon has to be configured to use the right authentication modules (mysql, userdb, whatever). Then patch [SpamAssassin] according to \[http://da.andaka.org/Doku/courier-spamassassin.html\] so that [SpamAssassin] can ask authdaemon for the whereabouts of the maildirs of virtual users (and plain users too --- but if you only have plain users, you may skip this step).

To let Courier MTA use maildrop as default for delivery, edit /etc/courier/courierd and set DEFAULTDELIVERY to "| /usr/bin/maildrop" (or whereever your maildrop binary is). Then edit /etc/courier/maildroprc, the central maildrop script:

exception {
        xfilter "/usr/bin/spamc"
}
exception {
        include "$HOME/.mailfilter"
}

Via the xfilter line, maildrop pipes its contents through spamc; via the include line, the user's mailfilter script is called.

Additional links

There is a rudimentary HOWTO at \[http://forums.gentoo.org/viewtopic.php?t=28392 the Gentoo forums\] for integrating [SpamAssassin] and f-prot with Courier-MTA.

, described in IntegratedInCourierUsingMaildrop.

There is also a rudimentary HOWTO at the Gentoo forums for integrating SpamAssassin and f-prot with Courier-MTA.

There is another HOWTO at Wiki MarkupThere is a HOWTO at \[http://da.andaka.org/Doku/imapspamfilter.html\] to feed [SpamAssassin]'s bayes filter via Courier-IMAP.

Integrated into CommuniGate Pro

• CGPSA

...

• : http://www.tffenterprises.com/cgpsa/ (should work on both Linux and Windows)
• CGPAV

...

• : http://program.farit.ru/doc/cgpav.html

SpamAssassin plugin for CommuniGate Pro 4.x

Installation and usage instructions can be found at
http://www.stalker.com/CGPSpamCatcher/#Integrate

• sa-cgp: ftp://ftp.vsu.ru/pub/apps/

...

• CGP/sa-cgp.c

...

• scanspam.sh (See wiki page for CommuniGate)
• cgSpamAssassin: https

...

• ://

...

• github.

...

• com/bret-miller/cgSpamAssassin (should work on both Linux and Windows)

Integrated into XMail (Unix)

...

[SpamAssassin] Filter (sa_filter.pl) is an \[http://www.xmailserver.org/ XMail\] filter send incoming email messages to [SpamAssassin] for spam filtering.

sa_filter.pl calls spamc, the SpamAssassin client (spamc calls spamd) and passes the output of spamc back to XMail for delivery. Neither sa_filter.pl nor spamc will delete emails that are flagged as spam.

Wiki MarkupPlease find the filter source code and documentation at \[at Drake Consulting

Integrated into Exchange (Windows)

See: http://www.drakeconsult.com/xmail/ Drake Consulting\]

Integrated into Exchange (Windows)

christopherlewis.com/ExchangeSpamAssassin.htm

Also: http://sourceforge.net/projects/exchangespamc

Integrated into Novell E-Mail Products

Novell sells two E-Mail systems: GroupWise (full-featured collaboration) and NetMail (ISP-quality standards-based E-Mail only).

GroupWise: The GroupWise MTA-equivalent (GroupWise Internet Agent, or GWIA) implements its own RBLs and other anti-SPAM measures. Guinevere http://www.openhandhome.com, written by the maintainer of the SA Win32 HOWTO, provides integration with SA.

NetMail: NetMail is closer to what most *NIX admins are used to. There is an open-source project at SourceForge for integrating 3rd party software with NetMail. See Novell NetMail Agent

Integrated into Mail Avenger

Mail Avenger is an SMTP Server that allows individual users to run tests on mail messages during SMTP transactions, so that unwanted mail can be rejected before the mail server accepts responsibility for the message. One advantage of this is that it allows you to bounce messages marked as spam by spamassassin. (You can, of course, bounce spam after spooling it, but then you risk sending bounce messages to innocent third parties when spammers forge the sender address, as often happens.)

Individual users can bounce spam by putting the following lines in their $HOME/.avenger/rcpt files:

bodytest edinplace -x 111 spamassassin -e 100

To run spamassassin by default for all users, you might place the following code in the file /etc/avenger/default:

test -n "$MAIL_ERROR" && exit 0
bodytest edinplace -x 111 spamassassin -e 100

The first line just rejects the mail immediately if Mail Avenger will end up rejecting it anyway, to save the overhead of firing up spamassassin.

Note that another theoretical advantage of Mail Avenger is that you ought to be able to feed the netpath and SYN fingerprint information it collects into the spamassassin's bayesian filter, but there is not currently any special support for tokenizing the X-Avenger header.

Integrated into Mailsweeper and Mailmarshal (Windows)

A Guide there shows howto intergrated SA (from the sawin32.sourceforge.net) as a plugin for Mailsweeper and this can also be used by Mailmarshal See: http://www.christopherlewis.com/ExchangeSpamAssassin.htmtooms.dk/articles_tutorials/howto_use_spamassassin_as_a_mailsweeper_plugin/

Notes for MTA-Integration Developers

See MtaIntegrationDevNotes.