Vernon Schryver said:
The problem with that is that Hotmail, Yahoo, and most of the rest of
the owners of the domain names that appear in SMTP Mail_From senders
in the majority of spam instruct their DNS servers to always answer
"yes, a.b.c.d authorized" for any and all IP addresses.
Do you really think hotmail.com aren't sick of spammers pretending
to send mail from their domain, and their domain thereby becoming
equivalent in many people's minds to spam?
--j.
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg