[Exim] General question ...

I am a nearly newbie with MTA ...

My exim setup works really well for some domains I host on my computer.

Now, I'd like to setup a backup server for DNS and Mail ... (At the moment,
I use an alias on the NIC, and two named that bind two differents adresses.)

The only thing i know is that I have to use several MX records with several
values for implementing the backup mail server.

Could one of you tell me (shortly) what are the main concepts to know to
implement a backup server with exim ?

Thank's in advance !

Georges


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