Backup Mail Server Questions

[Eric Crist]

Hello list,

I was wondering if anyone has any insight as to having a remote backup 
mail server and the setup of such.  I'm currently using sendmail, and I 
don't want to change that, so please don't recommend any of the other 
servers out there. ;)

One of my friends needs backup DNS/Mail in the even their connection 
goes down.  How do I go about setting it up so that his user base 
(about 80 users) will not see any problems in mail transmission and 
reception if their primary servers go offline.  I would like mine to 
automatically pickup the slack.

Thanks for your replies!

Eric F Crist
Secure-Computing Networks