I was asked if any linux mail server could be configured in HA configuration, but with one server in one office and the other in a remote site (i.e. far away, communicated by the internet). The servers would have about 100 normal, office users.
I thought about a couple of solutions:
* drdb won't work because a split brain situation would be hard to manage.
* cyrus imapd + imapsync may work, but I suspect that imapsync is just too slow to run it live.
* mswatch + maildir seems to be the best solution
But as being linux-based doesn't mean it has to be free (as in beer), and given its impressive features, does anybody knows if Zimbra can do this?
Thanks in advance,