Re: [cobalt-users] MX Records and failover servers

["David Thacker" <Cobalt@xxxxxxxxxxxxxx>]

> This doesn't quite work for me...
>
> I set it up as follows:
>
> - where domain.com is the default domain on my server; and
> - mail.vdomain.com is a hostname pointing to the third party mail server;
>
> I set up my DNS as such
>
> vdomain.com IN A IP.IP.IP.IP (IP address of Raq server)
>       IN MX mail.vdomain.com priority=5
>       IN MX domain.com priority=10
>
> If i lose a route from my local SMTP to mail.vdomain.com (which is quite
> common in Australia), it will get sent to domain.com which will then
> forward it to mail.vdomain.com, as long as it can see it. If it can't see
> it (e.g. because mail.vdomain.com is actually down as opposed to my
> connection to it), the mail bounces with an "MX loops back to me" error.


Chris,

I think you might be forgetting one important step: you need to tell
Sendmail on your RaQ that it should relay mail for that domain.  Do so by
going to the Email control panel, and add vdomain.com to the "Relay for the
following Hosts/Domains" list.  Click on Save Changes, and you're off to the
races.

David Thacker