I am planning to
move my domains to another box and another IP address. I’m well aware of
the propagation delays when a domain’s IP address changes. I need to
minimize the disruption to my users and obviously not lose any mail in the
process. Is there any ‘best practices’ for how to do
this?
Details: when
I actually throw the switch, some mail will begin going to the new box fairly
quickly while some mail from servers using a cached DNS entry for the domain
will continue to send to the old box until the cached address expires, which
could be a couple of days.
Likewise, some
users’ mail program will almost immediately start going to the new box while
others may stay on the old box for a couple of days.
So the question
is… is the right answer to just let whatever happens happen for a couple
of days, and then when the dust settles reprocess any leftover mail on the old
server to get it routed to the new server? The obvious problem with this
is the potential for mail that won’t be seen for couple of days. Is
there a tried and true better way.
Thanks.
Jerry
