I am trying to migrate all email accounts (about 30) from SME 7 to the latest version of Zimbra (open source). I have 2 test machines up and running to get it to work before going live. I have managed to use IMAPSync to move all the accounts over, but I cant seem to move the emails within those accounts. I cant seem to install dovecot which was my original idea, I think the SME 7 repositories arnt in existance anymore? Whats the best way to migrate everything over including emails and aliases without knowing the users passwords? I have looked everywhere for the answer from the zimbra wiki to forum posts but nothing seems to work for me :-( (guess its something I am doing!) I am using zimbra on ubuntu server 12.04.