From: Nuno Carrilho (nunoznunix.com)
Date: Tue Apr 08 2008 - 02:42:56 CDT

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Hello!

There is no important erros on the log files. I said postfix does not deliver them, it's not right. Postfix takes too long to deliver the messages. I have to downgrade postfix version do 2.2 again so it can deliver the mail in queue fast...

The mail flow in this servers is this way: imagine I have a domain xpto.com. when the mail arrives to postfix, it is delivered to IMSS so it can check the mail. It returns to postfix. Postfix has a transport list that says:

xpto.com smtp:mail.xpto.com:25

I have an internal DNS server on each postfix machine only for the zones of my domains (xpto.com),[1] because I have to do round robin for the several exchange servers on the local network.
So the internal MX record for xpto.com (mail.xpto.com) has several local IP addresses with them same weight.

This had to be configured this way cause IMSS for linux does not allow more than one delivery domain.

Thanks,

_____________
Nuno CarrilhoQuoting Wietse Venema <wietseporcupine.org>:

> Nuno Carrilho:
>> I have this servers running about one and half years with postfix
>> 2.2.10. Mailq with this version it's allways at a low level (300-500
>> mails each server). Every time I make the upgrade to version 2.3
>> or 2.4, after 5 minutes I have 6000 mails on the mailq. Postfix
>> does not deliver them.
>
> Postfix does not deliver mail without logging the reason why.
>
> http://www.postfix.org/DEBUG_README.html#logging
>
> Run the egrep command and look for panic, fatal and warning messages.
>
> Wietse
>
>

Links:
------
[1] http://mail.xpto.com

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