Date: Thu, 4 Oct 2007 10:12:31 -0700 From: David Southwell <david@vizion2000.net> To: freebsd-ports@freebsd.org Subject: Suitable port mail reject repeaters Message-ID: <200710041012.31295.david@vizion2000.net>
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Hi=20 There have been numerous attempts on one server resulting in entries of the= =20 following type in the log:( [xxxx] is a domain for which we receive mail).) Oct =A03 07:05:39 dns1 postfix/smtpd[93611]: connect from=20 mail.dolbeyco.com[70.61.148.178] Oct =A03 07:05:40 dns1 postfix/smtpd[93611]: NOQUEUE: reject: RCPT from=20 mail.dolbeyco.com[70.61.148.178]: 450 4.1.1 <Novitsky@[xxxxx]>: Recipient=20 address rejected: User unknown in virtual alias table; from=3D<>=20 to=3D<Novitsky@[xxxxx].com> proto=3DESMTP helo=3D<FRODO.DOLBEY.priv> Oct =A03 07:05:40 dns1 postfix/smtpd[93611]: disconnect from=20 mail.dolbeyco.com[70.61.148.178]=20 Where clearly the remote server is hoping to find we are either open to=20 relaying messages or probing to find email addresses we will accept. users with names that do not exist in the virtual alias table are being=20 rejected. However the same group of servers seem to keep on repeated failed= =20 attempts. What I would like to do is after receiving a number of attempts from a such= a=20 remote server to automatically refuse connections and reduce the log load. = I=20 believe there is a tool for doing that (say after a remote server has a=20 speciofied number of failed attempts). I am sure there is a port that does= =20 this but cannot find it!!
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