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

2015-12-01 12:02:02
Ned Freed writes:
> Gmail:   Webmail does not disclose originating client IP, apparently using
>         invalid Received: field to avoid doing so.

Invalid, how so?

I looked at one now, and the oldest Received contained "by", "with" and
"id" received-tokens. 5322 says all received-tokens are optional, 5321 says
that SMTP servers MUST add a "from" received-token, but that Received
wasn't written by an SMTP server and 5321 3.7.2 explicitly allows other
software to be different. 2476 says nothing.

What am I overlooking?

In my testing I saw the following sorts of fields:


Received: by lffz202 with SMTP id z202so35306770lff.3 for
<ned(_dot_)freed(_at_)mrochek(_dot_)com>; Wed, 21 Oct 2015 22:32:47 -0700 (PDT)


Received: by pasz6 with SMTP id z6so88255027pas.2 for 
Thu, 22 Oct 2015 07:30:31 -0700 (PDT)

That sure looks like an SMTP server to me so RFC 5321 applies, and I don't see
a "from" clause in there.


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