From owner-freebsd-isp@FreeBSD.ORG Mon Jul 17 14:30:25 2006 Return-Path: X-Original-To: freebsd-isp@freebsd.org Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BF5A916A4DD for ; Mon, 17 Jul 2006 14:30:25 +0000 (UTC) (envelope-from bas@cybox.nl) Received: from smtp-vbr13.xs4all.nl (smtp-vbr13.xs4all.nl [194.109.24.33]) by mx1.FreeBSD.org (Postfix) with ESMTP id 40B4A43D45 for ; Mon, 17 Jul 2006 14:30:24 +0000 (GMT) (envelope-from bas@cybox.nl) Received: from [10.0.2.100] (a80-126-130-215.adsl.xs4all.nl [80.126.130.215]) by smtp-vbr13.xs4all.nl (8.13.6/8.13.6) with ESMTP id k6HEUN9B045213 for ; Mon, 17 Jul 2006 16:30:23 +0200 (CEST) (envelope-from bas@cybox.nl) Message-ID: <44BB9EFE.8040409@cybox.nl> Date: Mon, 17 Jul 2006 16:30:22 +0200 From: Bas Hendriks User-Agent: Thunderbird 1.5.0.4 (Windows/20060516) MIME-Version: 1.0 To: freebsd-isp@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by XS4ALL Virus Scanner Subject: Sendmail: Deferred: Name server: xxx.xxx.xxx: host name lookup failure X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Jul 2006 14:30:25 -0000 Hello, I have a problem with one of my servers, Suddenly i am getting a lot of "Deferred: Name server: xxx.xxx.xxx: host name lookup failure" while DNS resolving on that box is ok(from the command line de backend servers do resolve and are reachable). The mail stays in the mailqueue. This is a mailscanning server (Mailscanner/Spamassasin/Clamav), witch functions as primary mx for several domains, after receiving mail it forwards this mail to backend servers(Using mailertable: domain.com smtp:backendserver-n.xxxx.xx). Any pointers on how to debug this would be appreciated! Best regards, Bas Hendriks -- extra info: [bas@mailscanner bas]$uname -a FreeBSD mailscanner.xxxxxx.xxx 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov 3 09:36:13 UTC 2005 root@x64.samsco.home:/usr/obj/usr/src/sys/GENERIC i386 [bas@mailscanner bas]$telnet 0 25 Trying 0.0.0.0... Connected to 0. Escape character is '^]'. 220 mailscanner.xxxxxx.xxx ESMTP Sendmail 8.13.4/8.13.4; Mon, 17 Jul 2006 16:19:58 +0200 (CEST)