[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
