I like this very much. This is exactly the situation I would like to
remedy.
Presently, all mailers must accept whatever is coming in since the
incoming string can be <> at diverse places (from, rec from, I am
gobbling them all up right now).
the choice is to accept everything, which is ok for a simple backend
smtp server
to filter and verify originators, which runs into a
snag presently when there is an allowed <>
to reject all <> which puts the firewall server into
violation with present RFCs.
A change of just this little piece in the smtp protocol would assure
that all instances of a message can optionally be verified. This
verification is only useful on firewall systems. Systems within a
trusted environment would not need to care at all.
MIke
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