We use Cyrus Imap Server since on year. It work Fine for us (Sendmail + Cyrus)
We have 2 Sendmail box for Hight Aviability in MX configuration and filter all messages (SPAM and Virus) for several domains names.
For some domaines, we are only MX relay, and mails are resend (by SMTP) to others storage mails server (Exchange and Domino) and some are delivered to our IMAP (Cyrus) server by SMTP (vitual users db is on this server box) and localy deliver by LMTP.
But we have only one IMAP server (with SCSI RAID disk) but we would like procure more secure aviability.
How to do this ? I dont not have good idea about this.
I'm working on a config right now which uses some modifications to the Murder infrastructure and a shared filesystem on a SAN, so that multiple servers can access the same mailstore to provide load balancing and/or high availability. The storage is still a single point of failure, but if you have a good array (e.g. Hitachi) with redundant controllers and redundant HBAs on the servers, the exposure is limited.
If/when the project is completed and running in production, more details will follow.
-- Kenneth Murchison Oceana Matrix Ltd. Software Engineer 21 Princeton Place 716-662-8973 x26 Orchard Park, NY 14127 --PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp
