nanog mailing list archives

Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus )


From: "Edward B. Dreger" <eddy+public+spam () noc everquick net>
Date: Sat, 10 Dec 2005 17:00:57 +0000 (GMT)


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:
davidc () brics com -*- jfconmaapaq () intc net -*- sam () everquick net
Sending mail to spambait addresses is a great way to get blocked.
Ditto for broken OOO autoresponders and foolish AV software backscatter.


Current thread: