Dovecot‘s administration utility can be used to manage various parts of Dovecot, as well as access users’ mailboxes. Here’s a list of some commonly used commands.

• Show all messages older then 30 days in user matt’s Inbox

doveadm search -u matt mailbox INBOX savedbefore 30d

• Expunge (delete) all messages older then 7 days in matt’s Trash folder

doveadm expunge -u matt mailbox Trash savedbefore 7d

• List current quota status for a user (-u) or all users (-A)

doveadm quota get -u matt