[K12OSN] Moving our email server

[Brian Chivers]

Could you not setup your new server as a secondary MX and lower the ttl to say 3600 of your DNS that 
way if / when you change the server mail will route through

Brian Chivers
Portsmouth College

Burke Almquist wrote:
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> First change the TTL on the dns record so it's much shorter than the 
> default (like down to and hour or half hour instead of a week). After 
> waiting for the old ttyl to expire, you can copy your old mailboxes to 
> the new server and shutdown the old server. As soon as you have the new 
> server running you can change your dns TTL back to a more reasonable level.
> 
> On Jan 5, 2007, at 7:37 AM, mrok12osn at eastgranby.k12.ct.us wrote:
> 
>> In the near future, I am going to need to move our email server from one
>> ISP (Cox Cable) to another (CEN - Connecticut Education Network) and I
>> have never done this before.  Our email server is FC5 (postfix) built 
>> from
>> the K12LTSP CD's.
>>
>> I'm wondering whether I can just put a second ethernet card in the email
>> server so both ISP's IP addresses (old and new) are active, update
>> iptables, and then notify the ISP that maintains our DNS pointers to
>> repoint to the new IP address.  Then after a couple of days, I can just
>> shutdown the old IP address.
>>
>> Will this work?  Are there any issue with postfix?  Any help or
>> suggestions are appreciated.
>>
>> Mark Orenstein
>> East Granby, CT School System
>>
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------------------------------------------------------------------------
    The views expressed here are my own and not necessarily 
                the views of Portsmouth College