Timeout setting

FUSTE Emmanuel emmanuel.fuste at thalesgroup.com
Fri Mar 26 09:44:54 UTC 2021

Le 25/03/2021 à 22:15, Mark Andrews a écrit :
> This is a bug in postfix. Temporary failures in the DNS are not supposed to result in permanent failure at the SMTP level.  SERVFAIL  is not NXDOMAIN.
This is not a postfix bug. Temporary failure are perfectly handled by 
postfix with a 450 SMTP temporary error, not a 550 permanent error.

450 4.7.1 Client host rejected: cannot find your reverse hostname, 
[]; from=<developer_bounces at insideapple.apple.com> 
to=<XXX at example.com> proto=ESMTP helo=<rn2-msbadger07105.apple.com> 
(total: 1)

You should have OS/network configuration problems. Such timeout are 
completely unnatural.


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