Use cases
A pasted backlog, not a live mailbox.
Morning pile
Paste the messages you copied. ACTION lines rise to the top of the draft. You still open your own client to answer.
Newsletter vs ask
A sales blast tends to land as LOW. A request for a file tends to land as ACTION, with a short reply draft.
What stays with you
No mailbox login, no auto-reply, and no send. The label is a reading of the text, not a score.