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Re:Why will SPF stop SPAM

2004-08-17 06:09:16
Why can't a spammer create many domains, and use an SPF record like this: 
"v=spf1 +all". 

There is a possible point for SPF developers here.  Perhaps SPF checkers should 
offer the option to kick out a flag or add a special header when they see a   
+all

Seems like a +all, though formally a legal part of the syntax, is a pretty 
clear indication that something is wrong.  At the very most charitable, it 
should be interpreted as an unknown.

Reminds me of the old hypothetical PDP-11 instruction Mov -(IP) -(IP).  
Formally, a legal part of the (highly orthogonal) instruction set, but 1. Not 
usually implemented and 2. producing a pretty bad (though amusing) result if 
actually executed.


Mark Holm
mholm(_at_)medrad(_dot_)com


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