deliveries verifiedcritical
Messages delivered
Messages a receiver accepted — the one unambiguous number in the set.
In detail
Accepted means the receiving server took responsibility for the message: a 250 after the body. It is the numerator of success and half the denominator of every rate the console draws. Hub gets the same information twice over: as this counter, and as messages arriving in the success queue, which the collector already reads. The queue carries per-message detail, the counter carries per-second shape; a monitoring page wants both, and they must agree.