cyrus replication : master to replica and replica to master

[Rob Mueller]

> Well - it's theoretically possible.  But I don't know anyone who's done
> it, and it has the potential to get ugly if you're delivering to the
> same mailboxes at each end.  There's nothing I can see that would
> actually stop it working.

I think Bron failed to put sufficiently large warning signs here :)

The difference between "in theory this would work" and the practice of 
actually doing it are huge. Basically it works only if you are 100% sure 
that only one side is ever being accessed at a time. eg. IMAP/POP/LMTP/etc. 
If somehow you get an LTMP deliver to different ends, then one side will end 
up overwriting the other.

In other words, DON'T DO THIS.

Rob