Moving to as new server

I will shortly have to replace the OS on my machine. For various reasons, I will not be able to use a program like “imapsync” to transfer my documents to a new server. All of the mail folders on my present PC are stored under “/var/mail/vmail”. If I copied all of the folders under “vmail” and moved them to the new PC, would Dovecot be able to access them normally? Dovecot would not be running while I moved the files.

Thanks