I just upgraded UFies version of Spamassassin which came with the following notice, so take heed shell users:

This version of SpamAssassin fixes a bug which caused mails sent
in 2010 to be flagged as suspiciously spammy. If upgrading to this
version, you are recommended to update any per-user caches previously
created by sa-compile, and to check mail already in your spam folder
for false positives more carefully than usual.