DO NOT REPLY OFF-LIST AND TOP-POST ON MAILING LISTS Am 21.12.2012 18:56, schrieb motty cruz: > Hello Reindl, > thanks for your prompt reply and I apologize for not being specific, the IP > address is a spammer and after too many > network connection errors Postfix should refuse connections but it continues > to accept connections from that > spammer IP Ads. > > I may be confuse with another setting? is there a way to refuse connection > when spammer is trying to farm user list? > > Thanks, > > On Fri, Dec 21, 2012 at 9:45 AM, Reindl Harald <h.rei...@thelounge.net > <mailto:h.rei...@thelounge.net>> wrote: > > > > Am 21.12.2012 18:25, schrieb motty cruz: > > Hello, > > I have the following in my configuration but does not seem to make any > difference on the connection errors I > see in > > the logs > > > > smtpd_error_sleep_time=1h > > smtpd_soft_error_limit=10 > > smtpd_hard_error_limit=20 > > > > log: > > Dec 21 09:22:53 mas postfix/smtpd[23941]: connect from > unknown[186.81.31.93] > > Dec 21 09:22:54 mas postfix/smtpd[23941]: NOQUEUE: reject: RCPT from > unknown[186.81.31.93]: 554 5.7.1 Client host > > rejected: cannot find your hostname, [186.81.31.93]; > from=<kg....@lincoln.com <mailto:kg....@lincoln.com> > <mailto:kg....@lincoln.com <mailto:kg....@lincoln.com>>> > > to=<jason_grif...@sscsinc.com <mailto:jason_grif...@sscsinc.com> > <mailto:jason_grif...@sscsinc.com > <mailto:jason_grif...@sscsinc.com>>> proto=SMTP helo=<lincoln.com > <http://lincoln.com> <http://lincoln.com>> > > Dec 21 09:22:54 mas postfix/smtpd[23941]: lost connection after RCPT > from unknown[186.81.31.93] > > Dec 21 09:22:54 mas postfix/smtpd[23941]: disconnect from > unknown[186.81.31.93] > > > > it's been going for about an hour and it does not stop, any idea? > > "cannot find your hostname" has nothing to do with the above settings > you have "reject_unknown_reverse_client_hostname" in your config and > the client-IP can not be resloved > > check your dns-resoltution on the server! > > weclome to the club - some minutes ago i restarted our > barracuda-spamfirewall becasue > it refused to reslove any hostnames in both directions, has in this case > nothing to > do with your probelm but broken DNS-resolution is the dead of e-mail
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