Re: [ietf-smtp] [Emailcore] Proposed ESMTP keyword RCPTLIMIT

[Dave Crocker <[e-mail]>]

On 3/15/2021 7:59 AM, Ned Freed wrote:
> I think this extension is an important thing to have, so I've put together the
> beginnings of a specification:
> 
>    https://datatracker.ietf.org/doc/draft-freed-smtp-limits/


Thanks for doing this.


Quick comments:


In the Introduction, I suggest adding:

      SMTP servers have always been able to announce a limit, in a 
reply, which means that the client first needed to issue a command.  The 
mechanism specified here avoids the overhead of that interactions, by 
announcing limits prior to any substantive interaction.


Also:

      The Limits mechanism provides an announcement at the start of a 
session.  Some servers vary their limits, as a session progresses, based 
on their obtaining more information.  The Limits mechanism does not 
cover in-session limitation changes.




d/
-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net