how do u do mail-server migration..
I mean changing the machine (and the IP).. I mean migration in such a way that all users emails are preserved and there is no interuption in the service...!?!
I'm with postfix.
basically it's very simple in case you are going to change machine and IP ...
1. prepare and configure new system, put it on the network (with new IP)
2. completely test functionality of incomming mail by telneting to port 25 (because no DNS MX record showing to your new server)
3. completly test outgoing mail
4. (re)configure one mail client to use new mail server and TEST it !
5. If not passed point 2. goto point 1.
6. Change MX record for your domain on appropriate DNS server and restart it.
7. Wait until new record propagate to all the inet or reconfigure your old mailserver as relay (forwarder) to new one
8. On every client the last time download mails and reconfigure it
to use new server9. Drink your vine, beer, tee, 100% fruit juice or natural water, but not chemically prepared sweet limonads :-) .
noro
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