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

John Levine <johnl@taugh.com> Mon, 15 March 2021 23:46 UTC

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Date: 15 Mar 2021 19:46:47 -0400
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From: "John Levine" <johnl@taugh.com>
To: ietf-smtp@ietf.org
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Subject: Re: [ietf-smtp] [Emailcore] Proposed ESMTP keyword RCPTLIMIT
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It appears that Sam Varshavchik  <mrsam@courier-mta.com> said:
>MXes which do not announce their limits are going to dominate for some time.  
>So, I still need to do this for the foreseeable time. So, what does this  
>SMTP extension buy me? The only thing I can think of: not duplicating  
>messages when I don't need to.
>
>But the thing is: I don't recall anyone raising this to me, as a problem.  
>This is not on my radar screen as a problem that wants to be solved.

I wouldn't think that your users would be very interested, but bulk mailers are desperate for
any hints about how much mail they can stuff at people without getting blocked or rate limited.

R's,
John