It is with some exhaustion and more than a little relief that I'm able to announce the completion of a new migration tutorial. This one's primarily intended for users moving from Dovecot to Zimbra but other people may find parts of it useful as well. At any rate, it's
right over here for your perusal. I'm particularly encouraging suggested improvements, typo-catching, and correction of any gigantic errors that I may have made.
Cheers.