25 Jul 16:19 2014
emails from mailman rejected with error "reject=550 Relaying denied. IP name possibly forged"
Abdullah Maskari <al.maskari <at> hotmail.com>
2014-07-25 14:19:18 GMT
2014-07-25 14:19:18 GMT
Hi, I seem to have an issue with my mailhost server randomly rejecting emails from my mailman server whenever they are directed externally. My current setup is I have a mailman server running mailman and sendmail which sends all emails to my mailhost server also running sendmail. Mailhost passes the emails through mailscanner etc. and then relays them either externally or internally based on the target email. Internal relaying works just fine but external relaying seems to sporadically accept some addresses for delivery and reject others. the choice of addresses it chooses to accept or reject is different for every attempt I am so for example for my first attempt it will forward the email to the first and 3rd external email addresses and reject to forward to the rest and on the 2nd attempt it rejects the the 2nd and 3rd and 4th but sends the emails to the 1st and 5th addresses just fine and so on. My mailman server's logs do n ot show any errors but my mailhost does. this is the extract in question from my mailhost server mail log file: Jul 24 09:08:52 mailhost sm-mta: s6O88pSr003296: from=<Source-email <at> external-domain.com>, size=2260, class=0, nrcpts=1, msgid=<cq0nx1du5icvm2eubfc8lvdy.1406189339980 <at> email.android.com>, proto=ESMTP, daemon=MTA-v4, relay=mail-we0-f174.external-domain.com [126.96.36.199]Jul 24 09:08:52 mailhost sm-mta: s6O88pSr003296: to=<mailman-list <at> dmz.on.internal-domain.com>, delay=00:00:00, mailer=esmtp, pri=32260, stat=queuedJul 24 09:08:53 mailhost MailScanner: New Batch: Scanning 1 messages, 2837 bytesJul 24 09:08:53 mailhost MailScanner: Virus and Content Scanning: StartingJul 24 09:09:07 mailhost MailScanner: MCP Checks: StartingJul 24 09:09:07 mailhost MailScanner: Uninfected: Delivered 1 messagesJul 24 09:09:07 mailhost MailScanner: Deleted 1 messages fro m processing-databaseJul 24 09:09:08 mailhost sendmail: s6O88pSr003296: to=<mailman-list <at> dmz.on.internal-domain.com>, delay=00:00:16, xdelay=00:00:01, mailer=esmtp, pri=122260, relay=mailman-s erver.dmz.on.internal-domain.com. [172.16.0.143], dsn=2.0.0, stat=Sent (s6O893Rm003831 Message accepted for delivery)Jul 24 09:09:16 mailhost sm-mta: s6O89FAL003309: ruleset=check_rcpt, arg1=<target-address <at> external.domain2.com>,(Continue reading)