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

2021-04-19 16:58:55
On Mon, 19 Apr 2021, Ned Freed wrote:
I'm especially interested in people's thoughts on rate limits. The problem I
have with rate limits is, well, how to express them. ...

A little surveying might be in order.

I see that Postfix lets you set both the numerator and denominator of the rate limit, but the denominator defaults to a minute. It has separate rate limits for connections and messages.

Exim also lets you set both, the examples use an hour. The documentation says that if you use a large interval that lets people send bursts.

Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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