The do-not-send list verifiedimportantWritten by the Hub

A suppression is a permanent decision about a recipient, and MailerQ stores the answer alongside it: the code, the extended status and the description that the failure will carry. That is better than a bare list, because the reason why an address was suppressed travels with every failure it causes. type is mandatory and has no column. Four bodies without it were refused with 400, and the schema does not mention it — the engine derives the type from the value on read and demands it on write. address and domain are the two values observed. code, extended and description are required too; a body of value alone is refused. For Hub this is the natural destination for hard bounces, and the natural place to look when a customer asks why a particular address never receives anything. It is also a list that grows forever unless something prunes it, and MailerQ offers no expiry here.