Receipts

A receipt is a record of one release of mail to one connection. A person can open any receipt to see exactly what left.

What a receipt records

Who received which message, which parts, when, for which query, and which details a rule removed. Only the person sees that last part.

Where you meet them

Every message you read carries its receipt id, as message.receipt in the SDK, and so does every webhook.

The ledger

Together, receipts form the ledger a person sees as Activity. Receipts are hash chained, so a missing one shows. Companies can export them for an audit, to show what each vendor received, when, and for which query.

How they’re kept

Sender and subject are sensitive even without a body, so receipts are stored under the person’s own key. The person decides how long they’re kept, with a default limit.

What a receipt can’t do

A receipt shows what left. It can’t recall it, and it can’t show what a connection did next. That’s covered by the connection’s own policies.