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Subject: Re: multiple mail servers
From: Rask Ingemann Lambertsen (rask-postfix
kampsax.k-net.dk)Date: Wed Jun 07 2000 - 13:58:37 CDT
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Den 09-Maj-00 08:53:13 skrev Alessandro de Manzano fĝlgende om "multiple mail servers":
>But I was thinking about a way to increase availability (sp?) and
>fault-tolerance: using another unix box (I've also a FreeBSD 3.4 box) for MX
>backup and smtp-outgoing only.
Adding another box is by far the easier way of increasing availability.
It is entirely possibly to have two Postfix servers with identical
configuration files. K-net.dk uses such a setup:
mailout1.k-net.dk. IN A 192.38.208.86
mailout1.k-net.dk. IN A 192.38.208.81
mailin1.k-net.dk. IN A 130.225.71.227
mailin1.k-net.dk. IN A 130.225.71.226
mailin2.k-net.dk. IN A 192.38.208.81
mailin2.k-net.dk. IN A 192.38.208.86
Outgoing mail is sent to mailout1 while mailin1 and mailin2 are used for
the MX records (the difference between mailin1 and mailin2 is the network
connection). So far (after around two years, I think) only power failures
have made both servers unavailable at the same time. Only a few aliases
differ between the server setups (email to news gateways, for example).
>What about my wish to separate in and out SMTPs ?
>(I really guess many other people already did it :)) )
It can be done, of course, but why? Then you lose the potential gain in
availability and the extra performance (assuming you have a need for it),
and you gain nothing, as far as I can tell, by separating incoming mail
from outgoing mail.
Regards,
/ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻTŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ\
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