23. August 2017
Spamassassin may be the standard anti-spam utility for servers, but it can't be considered to be either fast or low on resources. Bogofilter may offer some advantages, but unlike spamassassin, tutorials and how-to's are thin on the ground
Warning: this is a technical post, full of jargon and an expectation that it will be read by system administrators, so may not be of interest to all readers.
Integrating postfix, dovecot and bogofilter on a Raspberry Pi.
Edit: Some months have passed since installing bogofilter. It is not as fast as a daemon, but not as slow as spamassassin, either. As expected, it has taken a couple of months to build up accuracy, but the system is excellent, and now reliably marks some spam that always got through spamassassin. This seems a good way forward for lightweight email systems.