Originally Posted by vogelor
to migrate from one server to another is very hard to do.
to migrate the web is not the problem, but how to migrate the mail-server with no downtime (ttl of dns!)
to override this simply before migrating add own IP for cursomer/site to migrate.
and then after "ttl of dns" migrate all data with IP to another machine.
i assume You are ISP with more than 1 IP network