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

2015-12-01 03:37:01
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?


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