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The effect of spammers [was Re: [NMLUG] posts delayed]
Kevin Rosenberg wrote:
> [...] dictionary RCPT attempts on the mail server. The mail server gets
> tens of thousands of these a bogus RCPT attempts each day, so I added
> configuration to sendmail to throttle sending to multiple
> recipients. Well, as you might have guessed by now, the mail list
> [...]
Actually, "tens of thousands" is about 10 times too low. From yesterday's
mail log (even with RCPT throttling enabled):
$ ls -h mail.log.0
46M mail.log.0
$ grep -c "User unknown" mail.log.0
224415
Ideally, turning off throttling will not significantly increase the
SMTP load on the system.
Kevin
--
Kevin Rosenberg
kevin@rosenberg.net
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