+++ kishor bhagwat [25/02/02 03:30 -0800]: <going through old unread mail>
Does anyone have info on a realtime/almost realtime mail backup system using sendmail 8.9?
mail backups as in mirroring the mailboxes? Or as in using a backup MX?
If just a backup MX, set appropriate DNS records for the servers, and configure the second to accept mail for the domains handled by the first.
the main server and backup server are geographically distant.
This would be a problem only iff you are trying to synchronise mailboxes, I would recommend rsync+ssh (and use Maildir for the mailboxes rather than mbox).
Devdas Bhagat