I am not sure the best place to solve this problem but I will start with this list since the problem is impacting a heavy traffic mailman listserv.
Google recently started enforcing only a single From: header in RFC2822 causing bounces to members of a very heavy traffic list. A single person with bad mail client configuration is getting all of the Google Apps recipients removed from a list frequently. Postfix log entry: May 15 8:49:57 list01 postfix/smtp[27955]: 35C865058D2: to=< [email protected]>, relay=aspmx.l.google.com[74.125.137.27]:25, delay=3.1, delays=0.07/2.3/0.03/0.61, dsn=5.7.1, status=bounced (host aspmx.l.google.com[74.125.137.27] said: 550-5.7.1 [126.24.19.8 11] Our system has detected that this message is not 550-5.7.1 RFC 2822 compliant. To reduce the amount of spam sent to Gmail, this 550-5.7.1 message has been blocked. Please review 550 5.7.1 RFC 2822 specifications for more information. f47si18577759yhf.187 - gsmtp (in reply to end of DATA command)) http://webapps.stackexchange.com/questions/42771/emails-sent-to-gmail-domain-suddenly-not-rfc-2822-compliant-possible-to-bypass My question is can Mailman strip out the duplicate From: headers leaving the first one? I have searched for a Postfix solution with no luck. I guess I could work up a procmail solution for all inbound mail but really didn't want to add that layer of complexity if it could be handled by Postfix or Mailman. Thanks, Dave ------------------------------------------------------ Mailman-Users mailing list [email protected] http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org
