Am 30.03.2014 01:10, schrieb Peter: > On 03/28/2014 10:16 AM, Adam Moffett wrote: >> I'm seeing messages occasionally where the envelope sender is a >> verifiable address at someone else's domain, but the from: header >> contains some non-existent user @ our local domain. > > This is a very bad idea, to illustrate why here is the envelope sender > of your message (that I'm replying to): > Return-Path: <owner-postfix-us...@postfix.org> > > ...and here is the From: header: > From: Adam Moffett <adamli...@plexicomm.net> > > Obviously the two don't match, and equally obvious is that your message > is not SPAM.
while i agree that it is a bad idea to take headers into account as well as Barracuda networks started to do the same with their last firmware and so the spoofing protection kills *any* mailing list you missed "contains some non-existent user @ our local domain" however, mail is about SMTP and SMTP is about envelopes
