Re: File system mirroring for SMTP/POP Servers

[Erik Carlseen]

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
Mario Lopez wrote:
Hi,
I am seeking for a solution for having several SMTP/POP servers on 
different network locations, the problem is the following, we actually 
have one SMTP/POP server with MX backup to another server, ok this 
solution is ok for some scenarios but when the main SMTP/POP server goes 
down (it does not happen to much fortunately) the email is not lost but 
no one can access they email, and this tends to annoy people, is there 
any possibilty of having some kind of mirrored file system over the 
network so when one of the servers goes down the DNS would point them to 
the other IP (using the round robin dns feature or whatever) and people 
could download email?.

I have read about file system mirroring over NFS but it looks like 
something in development than a mature solution.

Thanks.