On Sun, 6 Apr 2003 08:24:27 -0400 (EDT)
Daniel Feenberg <feenberg(_at_)nber(_dot_)org> wrote:
The MUA could still forward to an MSA without contradicting the spirit
of the proposal.
An MSA that has some knowledge of where its messages come from, either
by SMTP AUTH or merely because it only accepts submissions from hosts
it trusts, can still relay that mail to other internet hosts without
generating DSN notices to innocent third parties.
That would require both that all .forwards and aliases are fully known
to the receiving MTA, and that they only operate within the field
controlled/behind that MTA.
No doubt that some mail architectures will not be able to do this.
Aye.
To reject mail for non-existant users the accepting MTA will have to
have access to the user list, which is sometimes not available to the
accepting MTA in the DMZ. That would have to change. The alternatives
are to stop bouncing bad email-addresses or become a vehicle for
spammers to abuse, neither of which is very attractive.
At the simple human end of affairs, if Susan Secretary typoes (or
misreads from handwritten notes) the address on the email her boss told
her to send to the CEO of partner-company, then she needs a way to find
out about it. Similarly for the email a grandmother sends her
granddaughter in her new job/college/etc.
--
J C Lawrence
---------(*) Satan, oscillate my metallic sonatas.
claw(_at_)kanga(_dot_)nu He lived as a devil, eh?
http://www.kanga.nu/~claw/ Evil is a name of a foeman, as I live.
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