[Dovecot] Right way to share some global mailboxes

Hello,

i'm using Dovecot since a long time but now I need to share folders for global mail adresses like info@ and support@ between all users.

What is the right way to share this mailboxes between many users (everyone with own read flag).

My config for location is: mail_location = maildir:/home/vmail/%d/%n:INDEX=/home/vmail-indexes/%d/%n

And now i have a folder like /home/vmail/bar.com/foo for sharing...

Thanks!