Fwd: Postfix SMTP server: errors from 118-167-100-152.dynamic.hinet.net[118.167.100.152]

[Rytec]

Dear members, Which restriction should I need to use to prevent HELO/EHLO connections with IP numbers ? This person is spoofing me. See example below. regards, Ryan -------- Originele bericht -------- Onderwerp: Postfix SMTP server: errors from 118-167-100-152.dynamic.hinet.net[118.167.100.152] Datum: Thu, 14 Jul 2011 14:02:49 +0200 (CEST) Van: mailer-dae...@mail.rytec.be (Mail Delivery System) Aan: postmas...@rytec.be (Postmaster) Transcript of session follows. Out: 220 mail.rytec.be ESMTP Postfix (Ubuntu) In: HELO 77.109.86.75 Out: 250 mail.rytec.be In: MAIL FROM: <ertre785...@hotmail.com> Out: 250 2.1.0 Ok In: RCPT TO: <t...@ms67.hinet.net> Out: 554 5.7.1 Service unavailable; Client host [118.167.100.152] blocked using b.barracudacentral.org Session aborted, reason: lost connection For other details, see the local mail logfile