Johnson, S wrote: > I just upgraded my Spamassassin/postfix/amavisd/sqlgrey to the current > version and now have a few users from MSN and Yahoo reporting an error > similar to this: > > > > 554 5.6.0 Reject, is=26786-18 - Bad_Header: Duplicate header field: > "Message-ID" > > This nondelivery report was generated by the program amavisd-new at host > mail.maildomain.com. Our internal reference code for your message is > 26786-18/vvPdH275wGUz > > Return-Path: [EMAIL PROTECTED] > > Message-ID: [EMAIL PROTECTED] > > User-Agent: Microsoft-Entourage/11.3.6.070618 > > Subject: Presentations > > Duplicate Header Field > > > > > > Can anyone tell me what could be going on here? > >
your amavisd-new is configured to reject mail with bad headers. as you see, this block legitimate mail. note that since your amavisd-new is sending bounces, you are a potential backscatter source. do not bounce mail after it was accepted by one of your servers. once mail is accepted, either deliver, quarantine or discard. discarding is bad, but bouncing is evil.
