From: Anders Norrbring (andersnorrbring.biz)
Date: Thu Apr 22 2004 - 15:10:40 CDT

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> Subject: Re: Backup mail server HOW-TO
>
> On Thursday, April 22, 2004 at 19:12 CEST,
> Anders Norrbring <andersnorrbring.biz> wrote:
>
> > I need to set up a backup mail server. Both the main server and the
> > backup are in the same domain, but on different IP's (of course).
> >
> > But I can't find any info on how to do it, or rather, I don't
> > understand how to accomplish it.
>
> List the name of the backed-up domain in relay_domains on the backup MX
> (and setup relay_recipient_maps if possible). This way, Postfix will
> accept mail for that domain.
>
> http://www.porcupine.org/postfix-
> mirror/newdoc/STANDARD_CONFIGURATION_README.html#backup

Well, almost, but not there yet... First, I don't have any problems with
the DNS config, that's crystal clear.

Perhaps I should elaborate a little on what I have and what I want to
accomplish.

1. I do have a fully functional mail system, Postfix and Cyrus.

2. I want a backup mail server for incoming e-mail, only store-and-forward.
   I.e. when the primary server is down, the backup should only function as
   a buffer for incoming mail, store it and send it over to the primary when
   it's back online. Worst case scenario would be 72 hours.

No need for user access to any e-mail, only incoming mail store-and-forward
is needed.

Anders.

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