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From Igor Chudov <ichu...@Algebra.Com>
Subject Spammers who "did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA"
Date Mon, 01 Oct 2007 17:32:17 GMT
[This message has also been posted to comp.mail.sendmail.]
My mailserver gets a lot of errors reported such as:

Oct  1 11:49:36 ak74 sendmail[31464]: l91Gnatt031464: nat.incompany.ru [83.167.0.4] did not
issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Oct  1 11:49:37 ak74 sendmail[31460]: l91GnXOc031460: [59.92.187.94] did not issue MAIL/EXPN/VRFY/ETRN
during connection to MTA
Oct  1 11:50:40 ak74 sendmail[31647]: l91Goe5W031647: pool-71-125-52-61.nycmny.fios.verizon.net
[71.125.52.61] did not issue MAIL/EXPN/VRFY/ETRN during connection 
to MTA

These errors are clearly spammers trying to send me spams. I would
like to know if there is some extension that would quietly junk all
these spams with as little CPU spent on them. I do not want to log
them, save them anywhere etc. Ideally, sendmail would either issue a
500 error or just quietly junk these messages.

I would prefer this done before queuing them locally and without invoking spamassassin. 

Any extension for this?

thanks

i

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