A.5 Related Mail Tools

The following sections point to information about various other mail tools mentioned in this book.

A.5.1 procmail

procmail is a popular and powerful Unix filtering program that acts as a full-featured local email delivery agent. It's available at http://www.procmail.org.

A.5.2 MIMEDefang

MIMEDefang is a Sendmail milter application written in Perl that provides a framework for mail content scanning, including virus-scanning, spam-checking with SpamAssassin, and MIME validation. It's available at http://www.mimedefang.org. Versions after 2.42 support SpamAssassin 3.0.

A.5.3 amavisd-new

amavisd-new is a high-performance daemonized content scanner, designed for use with Postfix, but it also supports Sendmail (including a milter version) and Exim. It's available at http://www.ijs.si/software/amavisd/. Don't confuse amavisd-new with amavis, amavis-perl, amavisd, or amavis-ng, all of which are other content scanners , most not actively in development, that now share little code in common with amavisd-new.

A.5.4 sa-exim

sa-exim is a local_scan.c replacement for Exim that provides SpamAssassin message-scanning during a SMTP transaction. It offers many options for how to handle spam that it detects, including teergrubing. sa-exim's home page is http://marc.merlins.org/linux/exim/sa.html.

A.5.5 exiscan-acl

exiscan-acl is a patch for Exim 4 that adds new content-scanning ACL directives to Exim. These directives can be used to invoke SpamAssassin on messages during a SMTP transaction. Some prepackaged Exim distributions already have this patch added. You can download it at http://duncanthrax.net/exiscan-acl/.

A.5.6 qmail-scanner

qmail-scanner is a content scanner for qmail that can run SpamAssassin on messages early in the delivery process. It contains its own implementation of spamc for faster checking. Find it at http://qmail-scanner. sourceforge .net.