Date: Wed, 19 Feb 2014 22:55:26 +0800 From: Unibe.ch <tafroz@mol.biol.ethz.ch> To: <freebsd-questions@freebsd.org> Subject: Unibe.ch Sign-In Alert : Id () placed on hold! Message-ID: <dfceda43-db34-4798-a2e1-25ae6327d8a5@CAS20.d.ethz.ch>
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Unibe.ch = = =20 From owner-freebsd-questions@FreeBSD.ORG Wed Feb 19 14:58:50 2014 Return-Path: <owner-freebsd-questions@FreeBSD.ORG> Delivered-To: questions@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 88DC669D for <questions@FreeBSD.ORG>; Wed, 19 Feb 2014 14:58:50 +0000 (UTC) Received: from edge10.ethz.ch (edge10.ethz.ch [82.130.75.186]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 258091E41 for <questions@FreeBSD.ORG>; Wed, 19 Feb 2014 14:58:49 +0000 (UTC) Received: from CAS22.d.ethz.ch (172.31.51.112) by edge10.ethz.ch (82.130.75.186) with Microsoft SMTP Server (TLS) id 14.3.174.1; Wed, 19 Feb 2014 15:55:36 +0100 Received: from [41.138.180.130] (176.127.38.212) by mail.ethz.ch (172.31.51.112) with Microsoft SMTP Server (TLS) id 14.3.174.1; Wed, 19 Feb 2014 15:55:38 +0100 MIME-Version: 1.0 Subject: Unibe.ch Sign-In Alert : Id () placed on hold! To: <questions@FreeBSD.ORG> From: Unibe.ch <tafroz@mol.biol.ethz.ch> Date: Wed, 19 Feb 2014 22:55:27 +0800 Message-ID: <dc659099-3389-4484-9f23-fc841f747c22@CAS22.d.ethz.ch> X-Originating-IP: [176.127.38.212] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Description: Mail message body X-Content-Filtered-By: Mailman/MimeDel 2.1.17 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Wed, 19 Feb 2014 14:58:50 -0000 = Hello = Your Email Id () was access from another device. As Part of our Privacy Agreement, you id has been placed on hold. Follow the below instruction to reactivate your Email PlaceCursorHere Note : The above link will self destruct in 15 minutes after mail has been= read! Failure to follow the above instruction will result in Permanente Deactiva= tion of your account. Unibe.ch = = =20 From owner-freebsd-questions@FreeBSD.ORG Wed Feb 19 15:54:11 2014 Return-Path: <owner-freebsd-questions@FreeBSD.ORG> Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 46E04314 for <freebsd-questions@freebsd.org>; Wed, 19 Feb 2014 15:54:11 +0000 (UTC) Received: from smtpb.telissant.net (smtpb.telissant.net [199.233.230.156]) by mx1.freebsd.org (Postfix) with ESMTP id 1806C158B for <freebsd-questions@freebsd.org>; Wed, 19 Feb 2014 15:54:10 +0000 (UTC) Received: from barrida.3dresearch.com (localhost [127.0.0.1]) by smtpb.telissant.net (Postfix) with ESMTP id 928D027339; Wed, 19 Feb 2014 10:54:07 -0500 (EST) X-Virus-Scanned: amavisd-new at telissant.net Received: from smtpb.telissant.net ([127.0.0.1]) by barrida.3dresearch.com (barrida.3dresearch.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eyVv9wc7d5IY; Wed, 19 Feb 2014 10:53:49 -0500 (EST) Received: from doncurzio.3dresearch.com (pool-71-112-5-200.pitbpa.east.verizon.net [71.112.5.200]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by smtpb.telissant.net (Postfix) with ESMTPSA id B40F8273A4; Wed, 19 Feb 2014 10:53:49 -0500 (EST) Received: from doncurzio.3dresearch.com (localhost [127.0.0.1]) by doncurzio.3dresearch.com (Postfix) with SMTP id 046E0A1E2F; Wed, 19 Feb 2014 10:53:49 -0500 (EST) Date: Wed, 19 Feb 2014 10:53:42 -0500 From: Janos Dohanics <web@3dresearch.com> To: Darren Pilgrim <list_freebsd@bluerosetech.com> Subject: Re: Reverse DNS question Message-Id: <20140219105342.f6b96b91e33a8d4bb2e8a3fb@3dresearch.com> In-Reply-To: <5303F01C.3030205@bluerosetech.com> References: <20140218180620.0807880cf0dd661482e394b9@3dresearch.com> <5303F01C.3030205@bluerosetech.com> X-Mailer: Sylpheed 3.3.0 (GTK+ 2.24.19; amd64-portbld-freebsd9.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: FreeBSD Questions <freebsd-questions@freebsd.org> X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Wed, 19 Feb 2014 15:54:11 -0000 On Tue, 18 Feb 2014 15:43:24 -0800 Darren Pilgrim <list_freebsd@bluerosetech.com> wrote: > On 2/18/2014 3:06 PM, Janos Dohanics wrote: > > My Postfix logs show entries like this: > > > > Feb 18 08:35:13 barrida postfix/smtpd[86649]: connect from unknown > > [207.238.171.17] Feb 18 08:35:13 barrida postfix/smtpd[86705]: > > connect from spam2.continental-realestate.com[207.238.171.17] > > > [...] > > # host 207.238.171.17 > > 17.171.238.207.in-addr.arpa domain name pointer > > mail1.continental-realestate.com. 17.171.238.207.in-addr.arpa > > domain name pointer mail.continental-realestate.com. > > 17.171.238.207.in-addr.arpa domain name pointer > > spam2.continental-realestate.com. > > > 1. Other than network congestion, what might cause this recurring > > name resolution failure? > > There are a couple of issues with the above: > > 1. More than one PTR record for a given IP address is a > misconfiguration. It is supported and there is no RFC saying you > must not have more than one, but in practice most software will only > look for one and thus only take the first PTR RR returned from the > query. So, the 3 names are returned in a random order, and if the first name returned does not resolve at all, or does not resolve to the smtpd client's IP address, Postfix will log it "unknown"? -- Janos Dohanics
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