/var/log/maillog growing out of control -- not sure what I'm missing...

[NetEndeavors]

All,

My maillog is just growing out of control and I'm wondering what I can do to eliminate the crap messages as shown below

Thanks in advance!
Dave

Jun  7 21:36:43 morel postfix/smtpd[10373]: NOQUEUE: reject: RCPT from unknown[186.18.149.18]: 450 4.7.1 <cpe-18.149.18.186.in-addr.arpa>: Helo command rejected: Host not found; from=<stubbedc@redbrain.com> to=<g2210046@ms18.hinet.net> proto=ESMTP helo=<cpe-18.149.18.186.in-addr.arpa>
Jun  7 21:36:43 morel postfix/smtpd[10373]: NOQUEUE: reject: RCPT from unknown[186.18.149.18]: 450 4.7.1 <cpe-18.149.18.186.in-addr.arpa>: Helo command rejected: Host not found; from=<stubbedc@redbrain.com> to=<g2211@ms18.hinet.net> proto=ESMTP helo=<cpe-18.149.18.186.in-addr.arpa>
Jun  7 21:36:43 morel postfix/smtpd[10540]: NOQUEUE: reject: RCPT from unknown[112.166.173.186]: 450 4.7.1 <QFSEDRNVIK>: Helo command rejected: Host not found; from=<bowlingn@okdokay.com> to=<mail@patterson-robbins.com> proto=ESMTP helo=<QFSEDRNVIK>
Jun  7 21:36:43 morel postfix/smtpd[10373]: NOQUEUE: reject: RCPT from unknown[186.18.149.18]: 450 4.7.1 <cpe-18.149.18.186.in-addr.arpa>: Helo command rejected: Host not found; from=<stubbedc@redbrain.com> to=<g2683751@ms18.hinet.net> proto=ESMTP helo=<cpe-18.149.18.186.in-addr.arpa>
Jun  7 21:36:43 morel postfix/smtpd[10373]: NOQUEUE: reject: RCPT from unknown[186.18.149.18]: 450 4.7.1 <cpe-18.149.18.186.in-addr.arpa>: Helo command rejected: Host not found; from=<stubbedc@redbrain.com> to=<g2894@ms18.hinet.net> proto=ESMTP helo=<cpe-18.149.18.186.in-addr.arpa>
Jun  7 21:36:44 morel postfix/smtpd[10436]: NOQUEUE: reject: RCPT from unknown[186.84.129.95]: 450 4.7.1 <Dynamic-IP-1868412995.cable.net.co>: Helo command rejected: Host not found; from=<sarahc55@skepticult.org> to=<cassidy@syzygy.net> proto=ESMTP helo=<Dynamic-IP-1868412995.cable.net.co>
Jun  7 21:36:44 morel postfix/smtpd[10373]: NOQUEUE: reject: RCPT from unknown[186.18.149.18]: 450 4.7.1 <cpe-18.149.18.186.in-addr.arpa>: Helo command rejected: Host not found; from=<stubbedc@redbrain.com> to=<g2@ms18.hinet.net> proto=ESMTP helo=<cpe-18.149.18.186.in-addr.arpa>
Jun  7 21:36:44 morel postfix/smtpd[10436]: NOQUEUE: reject: RCPT from unknown[186.84.129.95]: 450 4.7.1 <Dynamic-IP-1868412995.cable.net.co>: Helo command rejected: Host not found; from=<sarahc55@skepticult.org> to=<casey@syzygy.net> proto=ESMTP helo=<Dynamic-IP-1868412995.cable.net.co>

[till]

Looks like a spam attack. Or the DNS servers in /etc/resolv.conf are not reachable.

[NetEndeavors]

Thanks till,

I just reconfigured and reverified my DNS settings and did nslookups on each nameserver specified.... All checked out fine there....

Any ideas what to configure to suppress these messages? Or fail2ban rules I can put in place to curtail them?

Dave

[Mark_NL]

Looks like a spammer indeed .. might want to add some rbl checks in your config

just set your logrotator on daily or something, if the files tend to get to big.