DELETED mailboxes

[Riccardo Veraldi]

Hello,
I recently deleted some mailboxes.
Some of them where recreated with the same mailbox name.

So now i have the new mailboxes

user.user1
user.user2
user.user3


but issuing a lm command I still can see the old mailboxes are still 
existent like wit the DELETED prefix:

DELETED.user.user1
DELETED.user.user2
DELETED.user.user3

how can I purge the old mailboxes in the mailboxes.db without damage to 
the new mailboxes
and without damage to the content of mailboxes in /var/spool/imap ??

thank you

Rick