Re: File system mirroring for SMTP/POP Servers

[Mario Lopez]

I'm sorry I didn't mention it earlier, we use NetQMAIL + VPOPMAIL + mysql 
centralized auth.


Don't know what your budget / license contstraints are, but on the pricier 
side Lotus Domino Enterprise has excellent clustering capabilities with 
real-time replication and synchronization. Runs on Windows, Linux 
(i386,  IBM zSeries and s/390, I've made it run on SLES 9 AMD64 but this 
is not officially supported), zOS, OS/400, AIX, and Solaris. Supports POP, 
IMAP, and Web mail. If you use their client software, it has automatic and 
user-transparent failover.

That being said, it'd be fascinated in hearing about any successes you 
have with clustered F/OSS solutions.

Regards,
Erik Carlseen