Re: [Exim] Secondary mail server

Hi Marc, on Sun, 09 May 2004 18:34:12 -0700 you wrote:

[setting up a secondary MX]
> How do I do that? For some reason I can't find it in the manual.

Trivially, just add the domains that you want handled to +relay_to_domains
on the secondary MX, assuming the default Exim config.

However:

a) Consider whether you *really* need a secondary MX. Many situations
these days don't really require one, and adding one can create more
problems than it solves.

b) If you do need one, make sure that you duplicate all your access rules
(anti-spam/virus measures, and lists of valid users) across to the
secondary in one way or another, so that basically both machines give
identical responses. Otherwise your secondary will become a "leaky" back
door for spam, mis-addressed mail and other unwanted stuff.


Tim