[toaster] Backup mail server

[Sreedhar]

Hi ,
Ive suffered internet outage for more than 12 hours and i've missed some important mails.
to avoid such situations i would like to have a backup mail server with some other ISP with
secondary MX record with least priority. When the primary server is down, the secondary server
should pick mails and forward them to the Primary Server when it comes up. This should be done
transparently.

similar commercial service is available at http://www.microtech.co.gg/dns/email_server.php

Any idea?

Regards,
~Sreedhar