Miles,
It would probably be safe to assume that your list users no nothing of
your IP addresses, just your domain name. It should also be safe to
assume that you will be keeping your domain name during the move. IF
not, I have no suggestions that can keep your move invisible to your
users.
During your DNS transition, MX records will point your mail to the new
IP addresses. This IS invisible to end users. MX records ARE redirect
rules for mail. If these are not enough, a mailertable entry on the
old mail host, .forward files, or entries in the aliases file itself
should also be able to redirect your SMTP traffic to the new address.
Your archives, subscriber lists, and configuration files will have to
be copied BEFORE the activation of your new hosts/addresses, or the
redirected email will have nowhere to go. You can retrieve this info
remotely via commands to majordomo. As for the aliases file that
trigger majordomo commands, or the majordomo.cf file itself, you will
need the cooperation and assistance of the existing service provider
to send these to you or your new hosting service.
Dan Liston
Miles Fidelman wrote:
>
> Hi Folks,
>
> I've been leasing a host for a number of years - supporting mail
> (sendmail, pop/imap), mailing lists (majordomo, wilma and associated tools
> for web archiving), and web services for about a dozen virtual domains.
>
> I'm about to move to a new machine, with a new range of IP addresses - and
> I'm trying to figure out how to insulate my users from the transition.
>
> I'll have about 10 days when both machines are running, and I have a good
> handle on smooth web transitions - using redirects to shift all traffic to
> the new site and then letting the DNS changes stabilize.
>
> I don't have a good handle on how to handle a similar cutover for mail,
> mailing lists, and archives - can anybody offer advice on:
>
> - tricks on using sendmail.cf rules to do the equivalent of a web redirect
> (i.e., setting up a rule to shift all traffic for a domain to a new host)
>
> - a step by step sequence of events for cutting things over, along the
> lines of:
> -- a very short freeze on incoming mail
> -- copying archives and such to the new machine
> -- installing a set of redirect rules on the old machine
> -- unfreezing mail reception
References:
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