Forwarding mail in /var/mail?

I was changing configurations for postfix and dovecot the other day for hotmail to accept my messages and ended up with emails in different locations.

The main location for emails should be in each user folder in ~home/Maildir as a folder but I accidentally undefined the mailbox location for a day and all those emails for the day got sent to /var/mail/user file instead.

So right now I have various important emails stuck in /var/mail/user file that I wish to rescue and forward them again to their proper folder. I can see these emails just fine using mail -u user but I don't see anyway to forward those to themselves so they get sent to the corrected config to ~home/Maildir directory.

Is there a way I can rescue those emails from /var/mail/user ?