On 3/13/2018 10:51 PM, li...@lazygranch.com wrote: > I'm getting hit every 10 minutes from this spammer. As you can see I am > rejecting the message. I wonder if the offending email server doesn't > know the message is being rejected? > > Mar 13 23:28:58 centos-1gb-sfo1-01 postfix/smtpd[22153]: NOQUEUE: > reject: RCPT from unknown[113.247.6.67]: 450 4.7.1 Client host > rejected: cannot find your reverse hostname, [113.247.6.67]; > from=<sale...@tradepro.net> to=<li...@lazygranch.com> proto=ESMTP > helo=<mail.port25.com>
Have you looked at something like fail2ban that can automate an iptables block?
