> >So either put these clarifications into a separate draft and try to
> >advance it or start thinking carefully about what you are wishing
> >for.
> I'd suggest a separate draft, since this is a potentially complex
> topic where it'll be a challenge to document existing practice, much
> less decide who's right when practice diverges.
> Straw man:
> 220 server
> EHLO foo
> 250 whatever
> MAIL FROM:<a>
> 250 ok
> RCPT TO:<b>
> 250 ok
> RCPT TO:<c>
> 450 try later
> RCPT TO:<d>
> 550 no such user
> DATA
> blah blah
> .
> 554 ugh
> QUIT
> 220 server
> Which, if any, of b, c, and d get retried?
The message should be retried with recipient C only.
> Why or why not?
Because the 554 could mean either that the message as a whole is unacceptable
or merely that no recipients were accepted.
> What if the 554 were a 450?
Makes no difference.
Ned