[cobalt-users] RaQ as a secondary MX?

["Paul Welsh" <paul@xxxxxxxxxxxx>]

Hi

This is a pretty newbie question.

I have a raq3 that I want to setup to act as a secondary MX server for a
domain.

I'm happy enough with the DNS side of things.

I've done some searching on the archive and "Neil J. Kemp"
<neil@xxxxxxxxxx> said that what I need to do on the secondary server
is:

1. Edit sendmail.cw and append the name of the domain.
2. Edit virtusertable and append the aliases for whatever redirects or
storage I need.

What I'm unsure about is precisely what to add to virtusertable so that
the secondary server accepts all mail for a domain and relays it to the
highest priority MX server for that domain.

Also, if the highest priority mx server is down, what determines the
frequency at which the secondary server tries to forward the mail and
the number of attempts before it gives up?