View Full Version : Odd Mail Problem
10th March 2007, 21:00
Something is amiss with mail.
I don't have any catch-all mailboxes on my system and Postfix rejects 99% of unknown user email. But, at least 5 to 10 times a day unknown user email gets delivered to the server's root mailbox.
Any ideas what causes this and any ideas how to fix this?
11th March 2007, 12:06
Please check the headers of these mails, maybe they have been sent directly to a system user and then have been redirectd to the root mailbox.
11th March 2007, 12:55
I've starred at the headers and logs to find some kind of pattern but can't find anything. I never create users such as info@ or sales@ and I advise people not to do it because they are spam magnet addresses. But these are the very addresses that are being delivered to the server root.
Mar 11 06:21:26 server postfix/smtpd: connect from unknown[220.127.116.11]
Mar 11 06:21:27 server postfix/smtpd: 4291C1CB1EE: client=unknown[18.104.22.168]
Mar 11 06:21:28 server postfix/cleanup: 4291C1CB1EE: message-id=<20070311112126.4291C1CB1EE@www.domain.com>
Mar 11 06:21:28 server postfix/qmgr: 4291C1CB1EE: from=<email@example.com>, size=5282, nrcpt=1 (queue active)
Mar 11 06:21:28 server postfix/local: 4291C1CB1EE: to=<firstname.lastname@example.org>, orig_to=<email@example.com>, relay=local, delay=2, status=sent (delivered to mailbox)
Mar 11 06:21:28 server postfix/qmgr: 4291C1CB1EE: removed
Mar 11 06:21:28 server postfix/smtpd: disconnect from unknown[22.214.171.124]
The message headers show the same thing. Original to: firstname.lastname@example.org and delivered to: email@example.com.
11th March 2007, 13:00
Please do a:
grep firstname.lastname@example.org /etc/postfix/virtusertable to be sure that this address is really not in there. Also have a look at /etc/postfix/alias if there is a alias for info
11th March 2007, 13:16
info : postmaster
sales : postmaster
The exact 3 that have been coming in.
removed them and ran newaliases.
Thank you Till!
11th March 2007, 15:13
Well I spoke too soon.
Mail sent to unknown user mail.domain.com is now being delivered to a mailbox called mail.
Mail to email@example.com is being delivered to a mailbox called sales.
11th March 2007, 19:44
Yes, because mail and sales are existing system users on your server. If you want these mails to be delivered to another mailbox, create an email address/alias for sales/mail in ISPConfig.
12th March 2007, 12:18
OK, would it be "legal" to alias those names to a non-existent mailbox so they get rejected?
I know that postmaster must accept email, but the others are nothing but spam traps.
12th March 2007, 12:40
If it's only spam, remove the users, so mail is not even accepted at MTA level. Accepting mail means you are responsible. I would create those users and optionally modify the procmailrc to move all emails to /dev/null. But anything legitimate is also gone !
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