Migrating to new server. Help with mail.

[xciso]

Hello.
I am now setting up a new vps and i want to move everything from my old to my new.
I have set-up everything manual, like account, websites, ftp account and everything, but now i want to move all e-mails from my old server.

I am using imap to all accounts so i need to save everything from the server.
Anyone know how to do this? (Using dovecot)

Thanks! & Happy new Year!