Admin Loops

carlosinfl · 01-31-2008, 01:35 PM

I am currently running the following on my email server and I don't know who is to blame for this issue...

- Postfix
- Dovecot
- Spamassassin
- Mailman
- Squirrelmail
- ClamAV
- Amavisd-new

So the problem is really strange. When you send to an email address that does not exist on my domain, you get back a really strange message that looks like this:

This is the Postfix program at host mail.example.org.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

<admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+adm in+admin+admin+admin+admin+admin+admin+admin+admin+linux@example.org>
(expanded from <linux@example.org>): possible alias database loop for
admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admi n+admin+admin+admin+admin+admin+admin+admin+admin+linux

Final-Recipient: rfc822; admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admi n+admin+admin+admin+admin+admin+admin+admin+admin+linux@example.org
Original-Recipient: rfc822; linux@example.org
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; possible alias database loop for
admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admin+admi n+admin+admin+admin+admin+admin+admin+admin+admin+linux

As you can see the delivery failure is nasty. I don't get the same delivery failure on my personal email server and I beleive that mailman is responsible for the redundant delivery failure above however I am not sure. I went to /etc/mailman/aliases and found this entry:

Code:

# The ultimate loop stopper address
mailman-loop: /var/lib/mailman/data/owner-bounces.mbox

Should I comment that out and restart everything?

Thoughts? Suggestions?

ilikejam · 01-31-2008, 02:56 PM

A stab in the dark, but is 'luser_relay' set to anything in the postfix config?

Dave

carlosinfl · 01-31-2008, 03:17 PM

Code:

[root@mail mailman]# cat /etc/postfix/main.cf | grep "luser_relay"
# - You use the "luser_relay", "mailbox_transport", or "fallback_transport"
# luser_relay parameters.
# This parameter has precedence over the luser_relay parameter.
# The luser_relay parameter specifies an optional destination address
# The following expansions are done on luser_relay: $user (recipient
# luser_relay works only for the default Postfix local delivery agent.
#luser_relay = $user@other.host
#luser_relay = $local@other.host
luser_relay = admin+$local

Here is what I found...

ilikejam · 01-31-2008, 03:57 PM

Comment-out luser_relay and the problem should go away.

It's adding 'admin+' to the start of unknown users' email addresses, and attempting to re-deliver the mail, hence the loop.

Dave

carlosinfl · 01-31-2008, 04:39 PM

Quote:

Originally Posted by ilikejam

Comment-out luser_relay and the problem should go away.

It's adding 'admin+' to the start of unknown users' email addresses, and attempting to re-deliver the mail, hence the loop.

Dave

Dave - thanks for taking the time to review my problem and the suggestion. I will make the change Friday morning and test everything out after I reload Postfix.

Thanks again!

carlosinfl · 01-31-2008, 04:49 PM

Actually just made the change via VPN and it works great!!!

Thanks so much!

ilikejam · 01-31-2008, 04:59 PM

Cool cool.