[KLUG Members] Creating a mail server cluster

[Adam Tauno Williams]

> I currently have sendmail running together with a DNS server on my linux box. I
> can connect to my mail server using POP3 .
> The problem is I need an additional linux box running Suse with a backup
> mailserver and a second installation of BIND.
> I want users to see just one interface to the servers and I want the servers to
> back each other up. So if one dns/mailserver fails the other still supports the
> system.

Recent Cyrus builds support an aggregator -
http://asg.web.cmu.edu/cyrus/ag.html

> I know you can redirect mail from one server to another using the 'MAIL_HUB' and
> 'stickyhost' directive but it isn't clear that this will provide the clustering
> I need between the mail servers. It seems that mail simply gets passed from  
> the first mail server to the second but with unmatched messages being relayed.
> Is there any standard documentation relating to this?

Yep,  I wouldn't call that kind of setup a cluster.