[Mailman-Users] Gmail RFC 2822

[Dave Jones]

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=<
jsmith at example.com>, 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