DNS and Backup Mail Server

Mark Foster mark at foster.cc
Fri May 9 12:45:15 PDT 2003

Your setup provides failover only if blacklamb is unavailable. Even then
it is a manual failover (requires your intervention to fix).
Even better would be to have an additional MX record of lower priority
(higher number = lower priority) that would queue the mail for you in
case of another outage. That server should be "out there" on the

If you choose to do that, you'll need to find someone willing to do the
backup MX hosting for you. It's really easy to setup the backup. Ask a

Oh, and setting up postfix on blacksheep as *backup* is probably not
what you want... but I could be wrong. If the users/aliases don't exist
on blacksheep it might reject the mail.

On Fri, 2003-05-09 at 11:31, Drew Tomlinson wrote:
> While my FBSD system that performs mail services for my home network was
> down for a few days, it occurred to my that having a backup server would be
> optimal.  Since I am running FBSD as a firewall/gateway, I installed Postfix
> and configured it as a backup mail server per the docs.  However when I
> test, mail never makes it to the backup server.  I assume this is because I
> don't have proper DNS and/or NAT entries.

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