Re: RFC2821bis-09: Lines and Submission

John C Klensin wrote:

 [submission]
> If people are convinced that additional text is needed to
> explain this subject
The second paragraph in chapter 2.1 ends with:

| the less-capable clients discussed above SHOULD be using
| the message submission protocol (RFC 4409 [42]) rather
| than SMTP.

IMHO that is fine.  Please move RFC 4409 from "informative"
to "normative".  RFC 3461 and RFC 3464 are apparently also
covered by a SHOULD and therefore "normative".

 Frank