sophana wrote:
Hi I'm hosting a forum (phpbb) with more than 3500 users with centos 4.3. The forum admins would like to send an email to its (3500) users. I configured phpbb to use smtp (postfix-2.1.5-4.2.RHEL4.mysql.centos4) to send the email. I raised the max destination limit from 1000 to 5000, and made a test. Here the disaster began: Majority of the users received from 20 to 50 emails. Looking at the logs, postfix divided the email into several ones with 50 recipient each (as documented). I think the problem was that when one of the recipients was unreachable, the mail went into defered state, to be retried later. The problem (bug?) is that the mail was sent again to all 50 recipients, explaining why so many users received lot of mails. Anyone had a similar problem? Any suggestion for that?
That should not happen. Can you put together a test-case to prove the problem so you can provide a bug-report with a reproducible problem.
I use postfix, but if I had that problem and could nail it onto Postfix, I'd likely switch immediately to something else. Sendmail, probably.
OTOH I'd be using mailman for regular mailings. Whether that would creat a problem with postfix I don't know, but surely the combination is fairly common.
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