Mails in /var/mail, move to /home/domain/homes/usrname/Maildir structure

Hi,

On a new Webmin/Virtualmin Server mail is stored in /var/mail, but I am used to mails being in /home/domain/homes/usrname/Maildir

First Dovecot settings were set to look for mails in /home/domain/homes/usrname/Maildir, but no new mails got there, so I had to change settings to /var/main because I did not find out what to change for procmail so new mail is sent to /home/domain/homes/usrname/Maildir

As the server is already live I also have to move existing mails from /var/mail to /home/domain/homes/usrname/Maildir

So my questions are:

1) What to change in Postfix so new mails get to /home/domain/homes/usrname/Maildir ? 2) How to move mails for existing users from /var/mail to /home/domain/homes/usrname/Maildir ?

Thanks!