A client has inquired about Yahoo/VMG providing [552 1 Requested mail action aborted, mailbox not found] errors for bounced messages. Their sending app normally expects 552 errors to be errors with attachments or message size.
I understand the postmaster site indicates that any 5xx error should be suppressed/removed, but it seems intentional that they used this code rather than 554. Any insight would be appreciated. Regards, Mawutor
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