[CentOS] postfix problem since update: mail loops back to myself

Jay Leafey jay.leafey at mindless.com
Sat Sep 23 14:10:44 UTC 2006


David Hrbáč wrote:
> thorsten napsal(a):
>>> domain1.tld has:
>>> 20 server.domain2.tld
>>> 10 server.domain1.tld
>>>
>>> domain2.tld has:
>>> 20 server.domain1.tld
>>> 10 server.domain2.tld
>>>
>>> on server.domain1.tld we need to have:
>>> domain1.tld within virtual domains or local domain
>>> domain2.tld within transport
>>>
>>> on server.domain2.tld we need to have:
>>> domain2.tld within virtual domains or local domain
>>> domain1.tld within transport
> 
> So
> what does return postmap -q domain2.tld mysql:/etc/postfix/sql/transport
> on server.domain1.tld?
> what does return postmap -q domain1.tld mysql:/etc/postfix/sql/transport
> on server.domain2.tld?
> 

That brings something to mind that I ran up against a while back. In your transport map the destination needs to be enclosed in 
square brackets.  If not, then any MX records for it are used to determine the destination.  On server.domain1.tld, the map entry 
for domain2.tld needs to contain 'smtp:[server.domain2.tld]' instead of 'smtp:server.domain2.tld'.  The brackets tell Postfix (and 
Sendmail, for that matter) NOT to look up the MX records.

Hope that helps!
-- 
Jay Leafey - Memphis, TN
jay.leafey at mindless.com
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