Hi @ll happy new year, sorry not really postfix but may relavant for a lot of mailadmins using spamassassin a bug in date rule may lead to wrong spam declaration some big german mail provider have this problems i.e gmx
here is the fix http://wiki.apache.org/spamassassin/Rules/FH_DATE_PAST_20XX -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria