On Sun, 14 May 2023, Jeremy Harris via Exim-users wrote:
Hi!
On 14/05/2023 18:56, Markus Reschke via Exim-users wrote:
They take a list of common user names, add your domain name, and then loop
through 100 RCPT TOs per mail.
An escalating delay per RCPT *reject* isn't hard.
I was able to keep each spambot's connection about 6 hours open. >:) The
drawback is that you run the same amount of exim processes all that time.
So I moved to a simple ACL rule to drop the connection when the first x
recipients are rejected:
drop message = Too many bad recipients
condition = ${if and
{{>{$rcpt_count}{5}}{=={$recipients_count}{0}}}{yes}{no}}
ciao
Markus
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/ Markus Reschke \
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