Re: [EAI] I-D Action: draft-ietf-eai-rfc5336bis-11.txt

[Chris Newman <[e-mail]>]

--On July 25, 2011 17:36:50 -0400 Dave CROCKER <[e-mail]> wrote:
> I'm only going some points needing clarification...
>
> On 7/25/2011 10:16 AM, Chris Newman wrote:
>> 3. I suggest adding a statement to the end of section 3.5:
>>
>> SMTP servers are encouraged to detect that recipients can not
>> accept internationalized email headers and return an error
>> earlier in the transaction whenever possible.
>
> MDAs are often (almost always?) the only entities that know anything
> about recipient capabilities.  The statement should probably be revised
> so that it does not confuse transit relay operators.

Often there is an MTA adjacent to an MDA that might be acting like an SMTP 
proxy or a conditional SMTP proxy. Such an MTA can get rejections from the 
MDA in response to the RCPT command.

> In addition, I don't know what you mean by "earlier in the transaction".
> Do you really mean the difference between responding to a RCPT command,
> versus a DATA command in the same session, or did you mean something
> about the mail relaying sequence?

Yes, that's what I meant.

		- Chris