Originally published at guushu.com/notes . I keep the original updated, so this copy may lag. A Worker sent mail through Cloudflare Email Service, the messages were arriving, and the sender had checked the raw sources to be sure. The Cloudflare Email Sending activity log still listed only failures, and Analytics showed 0 successes and a 100% failure rate. I answered that thread on Cloudflare Community on Sep 24. You don't have to take the dashboard's word for it, or anyone's guess. The A...