We're running Postfix on a SLES 11 server which is set up to relay to Gmail. In the past few months delivery of internally generated Emails have experienced delays, sometimes hours. Looking at the mailq command I see lots of (gmail server said: 451 Please tyr again later (in reply to end of DATA command)).
It seemed like it must be something about Gmail being reluctant to accept mail from the server, but we've set it up as an Inbound Gateway, so anything it sends should be whitelisted. Looking at the headers on mail it sends, Google is seeing the server as whitelisted. I opened a case with Google, they escalated it a couple of times and came back with this: *"In looking at the logs you provided (thank you) the message "451 Please try again later (in reply to end of DATA command))" doesn't seem to be a Google issues message. We can tell this because of the message tagging that we use. When Google issues an error message it will be tagged with 'gsmtp' and for Postini it will similarly be tagged with 'psmtp'. What I believe is happening here is while the messages are attempting to be sent, they timeout before completion (during the DATA command). At this point, I'd recommend that you increase the timeout of the outbound SMTP server to allow for the completion of the messages. If the timeout is set to 1 minute, increase it to 2 minutes. Increasing the timeout on the SMTP server shold help avoid these errors by letting the data section complete and not having to wait the retry time and you should see a reduction in the amount of 451 errors that are generated."* I've worked with Sendmail, and only have the faintest familiarity with Postfix. I can't seem to find anything that suggests how to control timeouts on outgoing messages. Any incoming messages to this server are from other servers on campus, and there's never any problem receiving. Hopefully this is just an "add this line to main.cf" kind of thing. Any Postfix experts out there? Curt -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
