I once did a move where the servers were hosted on somebodyelses network and
they were geographicaly seperated. I used IPTables to forward connections
from the old server to the new one so the switchover was fully under my
control, then the DNS changes followed later - this allowed for easy
rollback.
-Andy-
-----Original Message-----
From: Ian P. Christian [
mailto:pookey@pookey.co.uk]
Sent: 13 November 2007 09:18
To: Jonathan Addleman
Cc: exim-users@???
Subject: Re: [exim] switching mail servers
Jonathan Addleman wrote:
> Can anyone suggest some documentation relating to moving a running
> exim installation to a new server? I have a system already in place on
> one machine, but I'm in the process of moving everything over to
> another one. Currently, mail is received locally for a number of users
> who generally access it via imap. (mail stored in ~/Maildir).
No low TTL on the MX is needed, and if you want, you can use 'perdition'
to do away with the low TTL on the imap addr.
First, I would set hold_domains.
I would add a router to the current one to deliver all mail to the new one.
I would tell users imap would be unavailable for a sort period.
move mailboxes, test nw sesrver, unhold domains, update MX.
