Prove a teammate sent an SI's email, so an emailed request can count as their order

Shipped

October 26, 2026 at 5:55 PM UTC

Author

Kamo

Commit

9cf83f2

An internal endpoint answers whether a message in a member's own mailbox was sent by a teammate: its From reaches a member of the same org, and that member's own Sent folder holds the same Message-ID addressed to the recipient. A forged From never passes; read only.