[Dovecot] restore lost emails

Hi,

I was wondering if anyone might be able to help me with this. I am running Postfix 2.7.0, Dovecot 1.2.9 and squirrelmail. Every week, I perform a back-up on both Postfix and Dovecot (maildir and conf folders). That's good because I have all the emails backed up. And now what I would like to ask is whether or not there are any easy way of restoring e-mails if some emails got deleted by accident or for other reason. So far, I have tried to look up the answer on the Internet but got a bit of vague answer.

Any help would be greatly appreciated.

Thank you