[ILUG] Sendmail: Setting up a secondary MX

[Colm Buckley]

> I am trying to work out how to set up a linux box as a secondary MX
> server for an other domain. I am using sendmail and could not find
> the information on how to do this in the sendmail faq... even a
> search on google turned up little. I know that mail is accepted for
> local hosts if the domain name is in /etc/sendmail.cw or similar
> file (on my system this file is called /etc/mail/local_domains). Is
> there a similar file for domains for which we are a secondary MX?
> Something that I can put in a .mc file? Or do I have to hack the
> sendmail.cf file and make lots of changes? I dont want to go near
> this scary file unless I know what I'm looking for.

In the default sendmail config, the corresponding file is called
"sendmail.cR" - look in your sendmail.cf file for a line like:

FR/etc/mail/sendmail.cR

(or any line beginning with "FR"), which should tell you where this
file is meant to live.

Might I suggest Donncha's excellent install-sendmail script, which
makes up sendmail.cf for almost every conceiveable eventuality.
http://members.nbci.com/xeer/software/ has details.

I'd also suggest changing to exim or postfix, which are about a
gazillion times easier to configure than sendmail is, but this might
be beyond the scope of your request.

         Colm

-- 
Colm Buckley, NewWorld Commerce, 16 South Cumberland St., Dublin 2, Ireland.
Personal: +353 87 2469146 / colm at tuatha.org   / http://www.tuatha.org/~colm/
Business: +353 1 4334334  / colm at nwcgroup.com / http://www.nwcgroup.com/
99 percent of lawyers give the rest a bad name.