I would like to delete old mail from root's sent mailbox but doveadm throws errors when I try to do this, not wanting to process root's mail at all (I am running the commands as root, naturally)
# doveadm expunge -u root mailbox Sent SENTBEFORE 1-Apr-2018 doveadm(root): Error: Invalid settings in userdb: userdb returned 0 as uid doveadm(root): Error: User lookup failed: Invalid user settings. Refer to server log for more information.
The error makes me think this is intentional, and I can see that makes a sort of sense, but it still leaves me with a Sent box that grow forever until I manually go in and remove old mails.
I am using passed for userdb and pam for passdb:
passdb { username_filter = "!*@*" driver = pam } userdb { driver = passwd }
Can I do this with doveadm or am going to have to resort to either manually removing the mail (hah!) or just crontabbing a task to remove the files more than 30 days old?