I've been reading for a week but I've yet to find a good solution.

I need to build a relatively easy to maintain, scalable Qmail cluster.

I'd like to have a cluster at the main location as well as at least one backup server on another network for redundancy.

The main use would be via webmail so need a full feature webmail but will also need as an optional offering, pop/imap.

Also, from your own experiences, what do you think you use for bandwidth to provide email to some 2000 to 5000 users? And what do you use to keep it fast as well as reliable? I have many matched servers which I can use which is why I'm thinking about a cluster.

Thanks much.

Mike