From: arjen (arjen-mlist3va.net)
Date: Mon Jul 17 2006 - 16:01:42 CDT

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Hi,

these last two days, after upgrading from postfix postfix-2.1 to postfix
2.2, I got nasty error messages in my logs:

  deferred (delivery temporarily suspended: unknown mail transport error)

after a lot of searching it turned out that the old mailserver
(postfix-2.1.3-2.fc1) seemingly accepted transport mappings in the form of

example.com smtp:[1.2.3.4:10025]

without complaining or bailing out. The new one (postfix-2.2.2-3.rhel4)
wanted no other than

example.com smtp:[1.2.3.4]:10025

(as stated in the documentation, by the way).

Maybe postmap could warn about faulty written mappings; it took me quite
a while to find out what was wrong.

Cheers,
Arjen.

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