High availability email server...

[rgraves]

Chris St. Pierre wrote:
> We've put /var/lib/imap and /var/spool/imap on a SAN and have two
> machines -- one active, and one hot backup.  If the active server
> fails, the other mounts the storage and takes over.  This is not yet

Also consider /var/spool/{mqueue,clientmqueue,postfix}.

Depending on how your server fails, there could be important incoming 
mail stuck in those queues, and silently failing over to a server 
without them could be bad.