Jon Kyme wrote:
There is an immediate "relationship" question here. Are we talking about
the domain "employing" those hosts or the domain being "responsible for"
those hosts? Note that an MX record lists the hosts a domain "employs"
as mail exchangers and that it has been common for a different domain
to be "responsible for" at least one of the MX hosts at some points
in the Internet's
history.
So my question one: is it valuable for a domain to be able to list the
set
of hosts it "employs" as outbound MTAs?
My question two: is it valuable for a domain to be able to list the set
of
hosts it is "responsible for" as outbound MTAs?
Interesting point. FWIW, I don't believe that a "domain" either "employs"
or "is responsible" for a set of MTA's. The "domain" isn't the
administrative entity, it's a property of the admin entity. The admin
entity is responsible, and may choose to publish details of its MTA
employment regarding particular domains. admin "has" domains, admin "has"
MTAs.
Assertions of "responsibility" are pretty much in whois (and/or dns NS ?).
Inbound "employment" is by dns MX, all (?) we need to do is fix a record
for outbound employment.
"those maintaining" make the connection (my 2p).
I would agree with John that a domain does not employ MTAs but rather
tells the outside world which domains handle outbound email for it
(outbound deployment). The domain IS NOT stating that is has control
over the MTAs in question, rather that they relay email for this domain.
HOWEVER, if HELO 2821 is used then you are stating that the MTA in
question is under your control.
Yakov
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Yakov Shafranovich / asrg <at> shaftek.org
SolidMatrix Technologies, Inc. / research <at> solidmatrix.com
"And this too shall come to pass"
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