best way to migrate from old mail server to new mail server w/ ispconfig.
We are considering installing ispconfig on a new server and migrating our current mailboxes over. We currently plan to only use ispconfig for our mail server. We will slowly migrate our other services (web, dns, etc.) later to new separate servers using ispconfig. is this possible to use ispconfig in this manner (ie., not use all of its functionality)?
Also, for mail, what is the best way to migrate?
We use Debian, sendmail, squirrelmail, and are converting to maildirs. We are on a short time table and are thinking of moving the mail to the new server for now and then later installing ispconfig. is that advisable?
Thanks for any help.