Receipts Versus Proof
AxiOwl has multiple success boundaries. They are not the same.
Receipt
accepted_by_axiowl means AxiOwl accepted the request and handed it to the delivery layer.
It does not mean the provider read the message.
Provider Acceptance
Provider acceptance means the provider edge reported that the message was accepted by its delivery method.
That is stronger than an AxiOwl receipt, but it still may not prove an end-to-end reply.
MCP Reply
An MCP reply is the strongest normal proof. It means the provider got the message, acted on it, and called back into AxiOwl with identity metadata.
Example
accepted_by_axiowl
This means:
AxiOwl took responsibility for trying delivery.
It does not mean:
The target provider displayed the message and replied.
Practical Rule
Use receipts for pipeline debugging. Use provider replies for support claims.