Hello,
I am looking at setting up a redundant load balanced mail cluster, and
would like to know how others have approached this?

The setup will be a few boxes to start, with the ability to add more
boxes to the cluster to spread the load. If one box fails, no mail
(stored, or queued) is lost.
After reading lots of scare stories about spools on NFS, I was
thinking that a SAN with GFS and postfix with maildir would be the
best option.

Anything I should watch out for, or do you think this should work?

Thanks a lot.

p.s. I noticed yum install GFS is having problems at the moment
https://www.scientificlinux.org/collector.2004-08-03.0265953686/16