REPOST: Store and Forward Email Server?

From: Bill Unger (billu_at_nospam.com)
Date: 10/09/03 

Date: Thu, 9 Oct 2003 08:38:03 -0400

QUICK EXPLAIN:
We have several clients hosting their own email servers. Their respective
ISP's have provided backup mail servers ( lower pref'ed MX records adjusted
accordingly ) to store their mail in the event their connection/server goes
offline and then to forward it on to the client's server when service is
restored. Unfortunately, we are running into more and more issues with this
as the ISP's are becoming more restrictive with this service. So we are
thinking about implementing our own store and forward email server as a
possible tertiary email server. We have a Redhat 9 server setup in a
dedicated network that would work great, but I am not sure where to start.

QUESTIONS:
1. Does anyone have any "pointers" on which mail server software is the
most suited for this type of scenario?

2. Does anyone have any suggestions on known "pitfalls?"

3. Does anyone know of any good tutorials on the subject?

Note about questions: I have googled quite a bit on this and get lost in
all of the Redhat Digests!

Thanks a ton in advance!
Bill

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