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? Thanks much.