Notes for Spamassassin for RHEL or Fedora
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Upstream spamassassin is no longer distributed with rules. Our package
contains rules in order to be less of a surprise to system administrators.
However just as you wouldn't rely on antivirus software without signature
updates, spamassassin cannot be relied upon without regular rule updates.
A systemd timer unit/service is provided to do this daily.
Note that the update script runs sa-update only if a known spam
daemon is running: spamd, amavisd, or mimedefang. If you do not run any
of these spam daemons but wish to have nightly sa-update, you may
override the daemon check in /etc/sysconfig/sa-update
/etc/mail/spamassassin/channel.d
All sa-update channels are defined in files contained in this directory.
See the existing config files as examples for writing your own config file.