MX fallback solution

[ephigenie]

shouldn't be that difficult ...
it's more a thing of replicating the postfix maps to another server so that the virtual domains & users are known to them, too.
then a second MX - entry and a few changes in the main.cf of the second(fallback) MX that should be enough, i think.

The replication can be established like some people do with bind atm. (download via cronjob & http) .