Douglas Otis wrote:
On Jun 9, 2007, at 1:51 PM, Hector Santos wrote:
That said, some systems, such as our own, have a one attempt only for
the "Implicit MX" rule. i.e. No MX -> A Lookup --> 1 attempt only.
This past week alone we would have electronic mail communications
fails with legit customers lacking MX records if this rule was enforced.
I just can't see this happening. I will have to see snow balls falls
from these South Florida skies before I would have our SMTP system
changed.
The concept is to first deprecate use of A records for discovering
inbound SMTP servers. After some period of time, then obsolete the use
of A records for this purpose.
Well Doug, go ahead and proposed it, write an I-D, see how it flies in
IETF-SMTP. And while you are there see if you get the IMC.ORG to stop
using MAIL.IMG.ORG as the return path domain WITHOUT a MX record.
Using your concept, you effectly stopped all bounce mail back to their
return path.
--
Sincerely
Hector Santos, CTO
http://www.santronics.com
http://santronics.blogspot.com
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