Rmail. How to filter spamassassin tags.

[Don Saklad]

Where would there be basic instructive details for users with
rather spotty levels of expertise, little expertise, no expertise
about how to compose, setup dotfiles for filtering Rmail
spamassassin tags?... the ideal would be instructive details that
explain line by line, expression by expression what would be
included in a dotfile for filtering and what each expression,
how each term will act.

Reference
For Rmail users where spamassassin tags appear on messages
already, here are hints, tips and pointers about how to filter
http://www.emacswiki.org/cgi-bin/emacs/Rmail