# Note: Modify the file locations to suit your particular and have 'chown root:root' and 'chmod 755' applied to it.
# This script should probably live at /usr/bin/spamfilter.sh # Simple filter to plug SpamAssassin into the Postfix MTA Then forward the rewritten version to Postfix's sendmail implementation: Postfix will still be the first line of defense, SpamAssassin will receive messages.
#POSTFIX SPAMASSASSIN HOW TO#
All spam e-mail will still come through to your address(es), but it will be clearly marked as spam.ġ) Create a bash script to receive e-mail from Postfix and pipe it to SpamAssassin for rewriting. Stop virus/spam scanning, keep DKIM signing/verification and Disclaimer Keep contentfilter smtp-amavis:127.0.0.1:10024 in Postfix config file /etc/postfix. This document describes how to lock down the Postfix mail server. This is a simple method to integrate SpamAssassin. Never bounce e-mail detected as spam either rewrite it and deliver it, reject it during the SMTP connection, or silently discard it. You could also silently discard e-mail to invalid recipient addresses, although this is a bit hostile to legitimate users trying to send you e-mail. Either have a 'catch-all' address that all e-mail to invalid recipient addresses goes to, or reject e-mail to invalid recipient addresses. Note that it is generally good practice to configure Postfix NOT to bounce undeliverable messages, as this can cause backscatter. Detailed information on setting up mail filtering (upon which the examples below are based) can be found in the Postfix FILTER_README documentation. Aside from the methods below, you can look in the examples folder included with SpamAssassin (located, for example, at /usr/share/doc/spamassassin/examples on Debian installs by default) for other options, like procmail. To integrate SpamAssassin into Postfix, you'll need to pipe incoming e-mail through a script or program that passes the e-mail to SpamAssassin for rewriting, and then either chooses to send it on or discard it (you may wish to discard it, for example, if SpamAssassin reports a very high spam score).īelow are some examples of how to do this using your own script to feed e-mail to SpamAssassin. Integrating SpamAssassin into Postfix using spamd This cloud tutorial simplifies the mail server configuration process with Postfix, Dovecot, MySQL, and SpamAssassin on Ubuntu.
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