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From: Havard.Eidnes@runit.sintef.no 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).

You are correct. Good memory! So, how do we enforce a 6 year old RFC? -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBMIIw4GZacKQwIslRAQE/6AQAlLduKbKJVbLKu91zVJhYqXv9WR6sL9QC TYzic48/4AGUElmlpUge4NvTD6R2VLSxeDQ5nXFT7P/3HMxuvtkZkpDtmyADzjSx /SauvnRlhgj5TTckfUr1e6zwNJNhQ25G5Pqe6qKzVkv8K3sFCf9AQCRBhN2qTEpW kQznEBp5raQ= =hAmv -----END PGP SIGNATURE-----