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Re: SMTP store and forward requires DSN for integrity (was Re:Cluelessanti-virus )
MS> Date: Sat, 10 Dec 2005 22:54:24 +1100 MS> From: Matthew Sullivan MS> RFC 2821 states explicitly that once the receiving server has issued a 250 MS> Ok to the end-of-data command, the receiving server has accepted MS> responsibility for either delivering the message or notifying the sender MS> that it has been unable to deliver. RFC2821 also says that a message MUST And RFC 1034/1035 (I forget which) specifies an RD bit which, in reality, is rather useless. Following RFCs is good for compatibility. However, RFCs are hardly infallible word from on high. Sometimes they require revisiting and revision. Eddy -- Everquick Internet - http://www.everquick.net/ A division of Brotsman & Dreger, Inc. - http://www.brotsman.com/ Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita ________________________________________________________________________ DO NOT send mail to the following addresses: firstname.lastname@example.org -*- email@example.com -*- firstname.lastname@example.org Sending mail to spambait addresses is a great way to get blocked. Ditto for broken OOO autoresponders and foolish AV software backscatter.