The best thing to do is lower your TTL well ahead of time of the move. If you lower your TTL down to about 5 minutes on your records your cutover should not take that long for mail to cutover to your new IP. Also, make sure you get your PTR records added ahead of time.
Also you have the option of adding the new ip address as a secondary MX so that when the first box goes offline it should start hitting it right away. Than all you have to do is update and remove the old MX.
Just make sure you lower the TTL's for any "A" records as well for how folks access the machine.
Darrell
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Dean Lawrence writes:
I am in the process of moving my Imail server to a different machine
at a different hosting facility, hence a new IP. Does anyone have any
suggestions for making this a smooth transition? I have moved Imail
many times before, so I am not worried about the setup. What I am
looking for is suggestions as to how to handle the lag time of routers
picking up the new IP.
I host mail for a number of my clients, so there may be a period of
time where they cannot get to their mail. I would like to minimize
this. I had thought about just turning off the old server once the DNS
changes have been made so that no mail would be lost in translation,
but I had also thought about converting it to a store and forward
server so that the mail will get delivered to the new server quicker.
What do you guys think?
Thanks,
Dean
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__________________________________________
Dean Lawrence, CIO/Partner
Internet Data Technology
888.GET.IDT1 ext. 701 * fax: 888.438.4381
http://www.idatatech.com/
Corporate Internet Development and Marketing Specialists
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