mail forwarding with fail-over lookup

[Kevin Darcy]

Unless I'm misunderstanding your question, just set up two MX records, your
primary with a lower preference value (= more preferred) and your fallback
with a higher preference value (= less preferred). See RFC 974 for further
information.


- Kevin

csnyders at attglobal.net wrote:

> Hi all, hope I am posting at the right place. Quick explanation:
>
> We have two Red Hat 6.2 servers set up as primary and secondary DNS servers
> as well as running qmail with fastforward to make use of the aliases file.
> We want to forward the mail destined for our application boxes (1 main, 1
> fail-over) to the main app box, and if that is down it must send on to the
> fail-over box.
>
> We presently have a similar setup running from our old firewall which acts
> as a mail relay (FWMAIL), this points to "active.domain.com", the active
> being defined in each boxes sendmail.cf file. We want to eliminate this
> setup in favour of a new firewall and our own 2 mail servers.
>
> So, the questions:
> 1) How do we do this "active" bit in the DNS on our mail servers?
> 2) How do we set up the firewall to do the same failover bit for passing on
> the mail to the two mail servers?
>
> Thanks for any info...I am totally lost with this one - Chris Snyders
>
> Support bacteria -- they're the only culture some people have....