Under the hood
Useful1 Signal2
Message delivery records whether the recipient matched exactly or was already pinned.
What's wrong with this entry?
Anonymous. No account, no email.
What
The send_message delivery event can now carry whether there was a single exact match and whether the recipient was already pinned, alongside the existing route, duration, blocked wait and via fields.
Evidence
exact_unique
Strings lifted out of the shipped bundle, so the claim above can be checked against them.