At 07:19 AM 5/17/2005 -0400, Bruce Lilly wrote:
On Sun May 15 2005 21:23, David MacQuigg wrote:
> My main concern is backward compatibility. Here are the
> relevant paragraphs:
>
> EHLO mailserver7.my-company.com
> ID mycompany.com
> MAIL FROM: bob(_at_)sales(_dot_)my-company(_dot_)com
>
> ...
>
> The proposed syntax will require extension of SMTP standard [RFC-
> 2821] and changes in current MTA software and practices. See section
> 7. IANA Considerations.
>
> MTA software will need to be enhanced and deployed at sites that
> provide email authentication. To minimize upgrade efforts these
> changes should be bundled with the upgrade to enable authentication.
>
> Receivers that don't recognize the ID command should return a Reply
> Code 500 COMMAND UNRECOGNIZED.
[...]
This is NOT backward compatible. See separate message on ietf-smtp for
an overview and pointers to detailed references.
Bruce, I appreciate your general advice, and I do read it carefully. I'll
need something more specific in this case, however.
I assume from the position of your comment above, that you are objecting to
the expectation that Reply Code 500 could be a normal and harmless
response. The key question for me is - Will it actually break
something? I've tried sending the ID command to a variety of receivers
using different server software, and they all respond with either 500 or
502, yes even Hector's super-strict Winserver!
--
Dave
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