Delivery errors have so far not been a problem that simply restarting mail_room doesn't fix. But it's possible we would not want those errors on delivery to stop fetching, or to mark messages as SEEN.
When using UNSEEN as the search command, it's impossible to have transactional mail because Google handles marking as SEEN. Whereas NEW/DELETED are controlled by mail-room after delivery.
Delivery errors have so far not been a problem that simply restarting mail_room doesn't fix. But it's possible we would not want those errors on delivery to stop fetching, or to mark messages as SEEN.
When using UNSEEN as the search command, it's impossible to have transactional mail because Google handles marking as SEEN. Whereas NEW/DELETED are controlled by mail-room after delivery.