Expunging and deleting old messages - moving from cyrus-imap

I have just moved from cyrus-imap to dovecot. In cyrus I had an automatic purge of messages marked as deleted with a cron job:

/usr/lib/cyrus-imapd/cyr_expire -E 1 -X 7 -D 7

-E = Expire Days -X = Expunge days

What is the equivalent in doveadm?

doveadm expunge -A DELETED BEFORE 1w

Is there any equivalent to expire messages marked as deleted? I can't remember why I have it as I set up Cyrus so long ago.

I also delete from deleted (INBOX.trash) anything older than a year. In Cyrus, it is run from an event in the configuration:

trashPurge cmd="ipurge -s -X -f -d 365 user/*/Trash" at=0104

I would be happy to run it from cron, so does this work:

doveadm expunge -A mailbox INBOX.trash SENTBEFORE 52w

Except I get:

doveadm(nobody): Error: mkdir(/nonexistent/.Maildir) failed:
Permission denied (euid=65534(nobody) egid=65534(nogroup))

I can run it for the individual users but not -A.

Nick