On Tue, 12 Sep 2000 12:03:54 +1100, Michael Shannon <[log in to unmask]> wrote: >Does anyone know if there is some sort of a list available for mail delivery >error codes? I know that there's no definitive stadard (yet) but surely >most mail servers use similar codes. I just find it difficult to sort out >what an error might be caused by when all I have is a code without an >explanation. See RFC 821 (The original SMTP specification) and RFC 1893 (Delivery Status Notification system) One source for these RFCs is http://www.imc.org/mail-standards.html but there are several other places as well.