Am 03.05.2021 um 16:47 schrieb Kenneth Porter:
I haven't found anything on rate-limiting it except as an anti-spam
measure.
However, sendmail runs milter. They made for sendmail native.
There is milter-greylist, which have "rcptcount".
You can cause a abort after a number of RCPT TO: from milter with a 4xx
errorcode, so the sending MTA comes back with a new connection.
regards Peter
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