[ietf-dkim] RE: I think we can punt the hard stuff as out ofscope.

[Hector Santos]

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