When ThunderBird forwards a message, it sends it with the ORIGINAL Date header:
This hits one of my header_checks for spammy mails: /^Date:.* 200[0-8]/ REJECT Your email has a date from the past. Fix your system clock and try again. Apr 23 09:18:26 mail postfix/cleanup[69286]: C6CE1118B9E8: reject: header Date: Tue, 29 Jan 2008 11:19:20 -0800 from *munge*.hsd1.dc.comcast.net[98.218.*,*]; from=<du...@dmainm> to=<u...@otherdomain> proto=ESMTP helo=<[192.168.0.2]>: 5.7.1 Your email has a date from the past. Fix your system clock and try again. Is this behavior of ThunderBird's normal? I've never encountered it with another client, but then again I am not normally seeing people forward emails from years past either. -- They say only the good die young. If it works the other way too I'm immortal