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Re: [ietf-smtp] [Shutup] Proposed Charter for the "SMTP Headers Unhealthy To User Privacy" WG (fwd)

2015-11-29 17:13:16
Not 100%. Contrast that with the message I sent to the list a few
minutes ago:

You're confusing SMTP and submission.

This is an SMTP received header, which tells us that you use v2.bluepopcorn.net to send mail from your bluepopcorn.net address, which doesn't strike me as much of a privacy leak.

Received: from v2.bluepopcorn.net (v2.bluepopcorn.net [IPv6:2607:f2f8:a994::2])
(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
(No client certificate requested)
by ietfa.amsl.com (Postfix) with ESMTPS id 1551C1B3847;
Sun, 29 Nov 2015 14:53:43 -0800 (PST)


This is a submission header. It does indeed have an IP address, but all th address 2001:470:1f05:bfe:a06d:6a7c:4078:aebf tells anyone is that you use a v6 tunnel from Hurricane Electric, the endpoint of which can be anywhere.

Received: from [IPv6:2001:470:1f05:bfe:a06d:6a7c:4078:aebf]
([IPv6:2001:470:1f05:bfe:a06d:6a7c:4078:aebf]) (authenticated bits=0)
by v2.bluepopcorn.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id tATMrfPA024552
(version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO);
Sun, 29 Nov 2015 14:53:42 -0800

Chris Newman's short proposal addresses this in the cases where (unlike you) the IP tells you something about the location of the user.

Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail.

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