Wolfgang S. Rupprecht wrote: > Marco Barreno <[EMAIL PROTECTED]> > writes: > >> Can someone with admin access to the list machine send me the SMTP >> logs for one of the duplicated messages? I'm working in the Gmail >> group at Google for the summer and I can have someone try to diagnose >> the problem from this end. The full SMTP logs would be helpful. >> > > I don't have access there, but I can fill in part of the puzzle. > > At least one of the opemoko machines at 88.198.124.203 opens an smtp > connection back to the sending domain to verify the sender address of > any incoming message. The smtp-back machine has messed up DNS. The > claimed rDNS for that IP is "openmoko.org" but the forward DNS check > for that "openmoko.org" doesn't list 88.198.124.203 as a valid > address. If the sending machine is checking for spammers claiming a > bunk DNS name will reject 88.198.124.203's SMTP verify. The opemmoko > machine will then interpret that failed smtp verify attempt as the > verified address not existing and will decline the initial incoming > transfer. > > In short, folks really need to check the forward and backward DNS and > make sure it is consistent, especially if that machine tries open an > outgoing SMTP connection (such as the attempted verification). > > Jul 9 12:48:17 arbol postfix/smtp[26802]: 29AF91C98001: to=<[EMAIL > PROTECTED]>, relay=sita.openmoko.org[88.198.124.203]:25, delay=6.2, > delays=0.18/0.04/5.4/0.64, dsn=4.0.0, status=deferred (host > sita.openmoko.org[88.198.124.203] said: 451 Could not complete sender verify > callout (in reply to RCPT TO command)) > Jul 9 12:55:35 arbol postfix/smtpd[26864]: warning: 88.198.124.203: address > not listed for hostname openmoko.org > Jul 9 12:55:35 arbol postfix/smtpd[26864]: connect from > unknown[88.198.124.203] > Jul 9 12:55:36 arbol postfix/smtpd[26864]: NOQUEUE: reject: RCPT from > unknown[88.198.124.203]: 554 5.7.1 Client host rejected: cannot find your > hostname, [88.198.124.203]; from=<> to=<[EMAIL PROTECTED]> proto=SMTP > helo=<sita.openmoko.org> > Jul 9 12:55:36 arbol postfix/smtpd[26864]: disconnect from > unknown[88.198.124.203] > Jul 9 12:55:38 arbol postfix/smtp[26863]: 29AF91C98001: to=<[EMAIL > PROTECTED]>, relay=sita.openmoko.org[88.198.124.203]:25, delay=447, > delays=441/0.05/1.2/4.3, dsn=5.0.0, status=bounced (host > sita.openmoko.org[88.198.124.203] said: 550-Verification failed for <[EMAIL > PROTECTED]> 550-Called: 64.142.50.224 550-Sent: RCPT TO:<[EMAIL > PROTECTED]> 550-Response: 554 5.7.1 Client host rejected: cannot find your > hostname, [88.198.124.203] 550 Sender verify failed (in reply to RCPT TO > command)) > > -wolfgang > That wouldn't cause duplicates.
You got a 550 error which means delivery was not attempted. I'll repeat again because a lot of people are coming up with some kinda wild answers. Google mail was causing dupes within google mail -before- it talks to any server outside of google mail. I posted the smtp logs of a message from one dupe chain that revealed this. I compared it with two other dupe chains and they both showed the same internal problem. Regardless it appears to have been fixed as google emails are no longer making dupe chains. -david
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