From owner-freebsd-questions Sun Mar 16 20:48:34 2003 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B5FAA37B404 for ; Sun, 16 Mar 2003 20:48:32 -0800 (PST) Received: from mgw1-out.MEIway.com (mgw1.meiway.com [212.73.210.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 21EBD43F93 for ; Sun, 16 Mar 2003 20:48:31 -0800 (PST) (envelope-from LConrad@Go2France.com) Received: from VirusGate.MEIway.com (virus-gate.meiway.com [212.73.210.91]) by mgw1-out.MEIway.com (Postfix Relay Hub) with ESMTP id 16587EF6A6 for ; Mon, 17 Mar 2003 05:33:14 +0100 (CET) Received: from localhost (localhost.meiway.com [127.0.0.1]) by VirusGate.MEIway.com (Postfix) with SMTP id DFC225D009 for ; Mon, 17 Mar 2003 05:52:08 +0100 (CET) Received: from mail.Go2France.com (ms1.meiway.com [212.73.210.73]) by VirusGate.MEIway.com (Postfix) with ESMTP id 959B85D008 for ; Mon, 17 Mar 2003 05:52:08 +0100 (CET) Received: from tx0-go2france-c.Go2France.com [24.242.169.51] by mail.Go2France.com with ESMTP (SMTPD32-6.06) id A81710900F0; Mon, 17 Mar 2003 06:07:35 +0100 Message-Id: <5.2.0.9.0.20030316223609.02afc1e8@mail.go2france.com> X-Sender: LConrad@Go2France.com@mail.go2france.com X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Sun, 16 Mar 2003 22:48:26 -0600 To: freebsd-questions@freebsd.org From: Len Conrad Subject: Re: Sending mail to this list In-Reply-To: <1047875517.3e754fbd6e85e@ra.dweebsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > > Mar 16 22:10:32 rackspace postfix/smtp[28417]: 8B00131673: > > to=, relay=mx1.freebsd.org[216.136.204.125], > > delay=11, status=deferred (host mx1.freebsd.org[216.136.204.125] said: > > 450 Client host rejected: cannot find your hostname, [65.61.155.146] > > (in reply to RCPT TO command)) "cannot find your hostname" is a postfix msg specific to failure of the ip sending as sender@sender.domain to have matching A + PTR records. the FreeBSD MX must have lookup table where, assuming Paul was sending as plathrop@mqtweb.com when he was rejected, that contains a list "frequently forged domains and/or domains known to have matching A + PTR records": mqtweb.com reject_unknown_client For such domains, Postfix takes the ip of the sending MTA, queries for its PTR hostname, and then queries for the A record of the hostname, which must have the same ip: C.D.B.A.in-addr.arpa. PTR some.host.name. some.host.name. A A.B.C.D Since 65.61.155.146 has no PTR hostname, the PTR + A match fails, and msg rejected. >I believe your mail is being rejected by the freebsd.org server due to >'65.61.155.146' not having a reverse pointer. that's sufficient to get rejected (no PTR will never be able to match an A record), but having a PTR is not sufficient to get accepted btw, the actual domain of some.host.name can be anything. i.e., it does not need to be "label.mqtweb.com" Len To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message