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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