Have to restore a mail only server and need to make sure I get everything right

Have a multiserver setup with dedicated mail servers. One of my vm mail servers is having a problem and I need to restore an image that is about a month old and restore recent files from our nightly backup R1soft backup system

I think ISPConfig uses MySQL for the user info so all I should have to do is restore the /var/vmail folder and the MySQL db. Is it that simple or am I missing something. In Tools I see a Resync Mailboxes, does this just re-create the mailboxes. Should I run this before I attempt to restore?

Would appreciate any help with someone who has run into this before. I am still limping along on the old server but if that server shuts down or the server hangs up I will lose it forever. Not an ISPConfig problem but rather a vm problem with xenserver but its affecting my ISPconfig network.
Thanks!

 

Was successful. Thanks!