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How often each vendor reports an outcome, and how long it takes to arrive. This screen exists because of a specific way of being misled. The delivery rate on the Vendors page is computed over reported traffic — so a vendor that reports on two messages in five can show 95% there while three in five of everything you sent it have no outcome at all. The rate is not wrong. It is answering a narrower question than it appears to. This page widens the denominator.

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The table

One row per vendor, over the chosen range: The reporting rate is the only figure here shown as a coloured badge — green at 95% and above, plain from 70%, red below. A vendor under 70% is losing you your own view of what happened to traffic you have already paid for. A vendor with no name recorded appears as no vendor.

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The four things worth reading twice

Reporting rate leaves in-flight traffic out of the denominator entirely. Messages sent a minute ago have not had their chance yet, and counting them as silence would make every vendor look worse the sooner you looked at them. “Gave up on” is us, not them. It is our own sweeper writing an expiry because no receipt ever arrived. Those are not counted as reported — which is exactly the difference between this table and the delivery rate elsewhere, where the denominator is one the vendor itself chose. “Delivered” is a share of what was reported. It says nothing whatsoever about the messages in the two columns before it. A vendor reporting on 40% of its traffic and delivering 99% of that has delivered, as far as anyone can prove, 40% of what you sent. Progress counts non-terminal receipts — ACCEPTD, BUFFRED — which say a message is moving without saying how it ended. A vendor sending none of these is not at fault; it simply will not tell you anything before the end.
On a gateway that does not record interim receipts, the Progress column is blank rather than zero, and the page says so beneath the table. A zero would be a claim about the vendor. A blank is a claim about the gateway, which is the true one.

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Reading it in an incident

A vendor whose reporting rate has fallen while its delivery rate holds steady has not started failing to deliver. It has started failing to tell you, and the two are indistinguishable from the Vendors page alone. Traffic still leaves, customers still get charged, and your evidence quietly stops accumulating. The same figures appear as a compact line on each vendor’s own card, labelled Reports outcomes, Median to outcome, 90th percentile and Never reported.

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What it needs to say anything

Both the submission and its receipt, across at least two vendors — with one vendor the table is a single row and there is nothing to compare it against. If nothing settled in the window at all, the page reads No traffic in this period.