Im wanting to move my mail server off my main system. would i be right in thinking the best way to do this is to set up my extra server as a mail server, then set it to be a mirror of the original mail server for say a week, then update my dns records to point to the new server and disable the original mail server both in ispconfig system services and removing postfix from the server?
I would do it like this: 1) install the new mailserver and attach it as slave to the current server. 2) change the value of the "server_id" field for all records in the the mail* and spamfilter* tables to the ID of the new server. 3) copy over the whole /var/vmail folder from old to new server. ensure that you preserver permissions and owners of the files. 4) run tools > resync for mail and client records in ispconfig.
guessing then set the server to be not a mirror so it is then its own entity. im goin to be getting 2 vps one as main mx and one as backup mx
