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Summary: IPv6 encapsulated IPv4 sender not detected correctly
Version: SVN Trunk (Latest Devel Version)
Got a 419 scam spam with an IPv6 encapsulated IPv4 address that was not
Received: from userPC ([::ffff:22.214.171.124])
(AUTH: LOGIN firstname.lastname@example.org, TLS: TLSv1/SSLv3,256bits,AES256-SHA)
by mail.xxxxxxx.com with ESMTPSA; Mon, 25 Apr 2011 16:nn:00 -0500
"I believe that this is a new method to obfuscate an IPv4 address from
harvesters and DNSbl's by hiding it in a IPv4 over IPv6 tunnel address so that
it doesn't get processed." says a friend.
I might call this v4 obfuscation via v6.
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