>you are searching for heartbeat and drbd >> >> But this will "just" provide the HA filesystem, won't it? >> >> Isn't there a technology available in Cyrus IMAPd which will replicate >> changes to a mailbox to two different servers? >> Firstly, hello to the list. drbd is a file system replication program. However heartbeats will allow for a redundant imapd as it can start a new server if the first one dies. The config you would need is to use drbd to mirror the data directories so that the mail was on both servers and then use heartbeats to detect if imapd had died. It could then start a new server automatically. Regards, Jack Stone ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html