[Mimedefang] Check if smtp server is alive
Bob Covell
bcovell at rolet.com
Sat Dec 2 14:59:01 EST 2006
That makes sense. It would basically be just like a public backup
mailserver but private. Each filter server is already running it's own dns
so this should be fairly easy. Will look into "views".
Thanks,
-Bob
-----Original Message-----
From: mimedefang-bounces at lists.roaringpenguin.com
[mailto:mimedefang-bounces at lists.roaringpenguin.com] On Behalf Of David F.
Skoll
Sent: Friday, December 01, 2006 8:39 PM
To: mimedefang at lists.roaringpenguin.com
Subject: Re: [Mimedefang] Check if smtp server is alive
Bob Covell wrote:
> ----Question----
> What would be the best way to verify that the target mail server is alive
> and if not re-route it to a "backup" mail server?
> ----Scenario----
DNS.
Hold on before you object!!!
> Also, we are NOT wanting to perform the backup via dns. We could have
> another MX with a higher weight but our goal is to have a non-published
> backup mail server.
You publish one MX record for your domain:
rolet.com MX 1 canitbox.rolet.com
Your mailertable on the MIMEDefang box looks like this:
rolet.com esmtp:[back-end.rolet.com]
You then run a local nameserver on the MIMEDefang box that *only* the
MIMEDefang box uses. You publish a private zone (visible only to
the MIMEDefang box) that looks like this:
back-end.rolet.com MX 1 preferred.back-end.rolet.com
back-end.rolet.com MX 10 backup.back-end.rolet.com
Presto! Works like magic. :-)
(You don't need an actual private nameserver if you use bind 9. You
can do the same thing with "views".)
Regards,
David.
_______________________________________________
NOTE: If there is a disclaimer or other legal boilerplate in the above
message, it is NULL AND VOID. You may ignore it.
Visit http://www.mimedefang.org and http://www.roaringpenguin.com
MIMEDefang mailing list MIMEDefang at lists.roaringpenguin.com
http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
More information about the MIMEDefang
mailing list