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Re: Motion for a new POST NSF AUP
From: Havard.Eidnes () runit sintef no
Date: Mon, 16 Oct 1995 10:56:27 +0100

   Another suggestion was that SMTP headers always contain the
   IP address.  I've seen this in quite a few mailers already.
   All we need is a slight modification to the SMTP Receipt
   standard.  This could be a Best Current Practice, quickly
   published!

Hm, this is already covered.  RFC 1123 says:

      5.2.8  DATA Command: RFC-821 Section 4.1.1
...
         *    The FROM field SHOULD contain both (1) the name of the
              source host as presented in the HELO command and (2) a
              domain literal containing the IP address of the source,
              determined from the TCP connection.
...
         DISCUSSION:
              Including both the source host and the IP source address
              in the Received: line may provide enough information for
              tracking illicit mail sources and eliminate a need to
              explicitly verify the HELO parameter.

Thus, this is not a new suggestion (RFC 1123 is dated Oct 1989).

Regards,

- HÃ¥vard


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