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Transport entries that resolve to localhost will cause mail loop
Submitted by PrawnStar (registered user) on Thu, 2008-05-22 13:43.

After spending quite a few hours debugging what a friend had done when following your excellent tutorial, I had a problem with loopbacks:

[QUOTE]May 22 12:34:34 odin postfix/smtp[8486]: 7499E215021A: to=<davie@*****.***>, relay=none, delay=0.06, delays=0.05/0.01/0/0, dsn=5.4.6, status=bounced (mail for localhost loops back to myself)[/QUOTE]


The problem was a result of him adding an entry in the transport table that resolved to the local machine:

[QUOTE]INSERT INTO `transport` (`domain`, `transport`) VALUES ('example.com', 'smtp:mail.example.com');[/QUOTE]

It might be worthwhile inserting a little note around this point to stop other people having the problem.

Thanks again for the tutorial.

-Colin

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