And how, exactly, is a sender to determine someone read an email one has sent?
Seems to me, the best one can do is be satisfied with no DSN. joe a. >>>>. Chiming in here, the 'abstract' of the same RFC clearly states: This specification enumerates and describes Internet mail addresses (mailbox name @ host reference) to be used when contacting personnel at an organization. To me, that sounds as if you should be able to reach an actual human being ('personnel') by sending to the specified addresses. Ignoring messages that get sent there which are valid within the context for the addressee seems a clear violation. I.e. ignoring marketing mails sent to abuse@ would be ok, but ignoring abuse complaints isn't. -- Tom