Legitimate eXtension headers as X- are easily filtered as "this is something you shouldn't pay attention to because it's not part of any standard". Take away the X- and you go back to the 'ok what is legitimate and what is not' situation...
Oh, that's easy. They're all legitimate. If you're wondering which ones have some sort of standards status, you can look here but you'll find a lot of dusty old experiments that nobody really uses.
http://www.iana.org/assignments/message-headers/message-headers.xml Regards, John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY Please consider the environment before reading this e-mail. https://jl.ly _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop