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

Edward B. Dreger eddy+public+spam at noc.everquick.net
Sat Dec 10 17:00:57 UTC 2005


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
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