From owner-freebsd-questions@FreeBSD.ORG Mon Jun 7 15:11:43 2004 Return-Path: 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 CA65B16A4CE for ; Mon, 7 Jun 2004 15:11:43 +0000 (GMT) Received: from adsl-68-76-19-75.dsl.klmzmi.ameritech.net (adsl-68-76-19-75.dsl.klmzmi.ameritech.net [68.76.19.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id BE32643D46 for ; Mon, 7 Jun 2004 15:11:34 +0000 (GMT) (envelope-from Luke@FoolishGames.com) Received: from TIEFIGHTER (adsl-65-42-187-205.dsl.klmzmi.ameritech.net [65.42.187.205]) (authenticated bits=0)ESMTP id i57FB3Ol073942; Mon, 7 Jun 2004 11:11:15 -0400 (EDT) (envelope-from Luke@FoolishGames.com) Message-Id: <200406071511.i57FB3Ol073942@adsl-68-76-19-75.dsl.klmzmi.ameritech.net> From: "Lucas Holt" To: "'Bill Moran'" , "'Lenny Thompson'" Date: Mon, 7 Jun 2004 11:10:57 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: <20040607085739.352eba17.wmoran@potentialtech.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2096 Thread-Index: AcRMjyGK/nRB4ewPQBSwlMPvffkk1wAEYHvQ X-Virus-Scanned: clamd / ClamAV version 0.71, clamav-milter version 0.71 X-Virus-Status: Clean cc: freebsd-questions@freebsd.org Subject: RE: ISPs blocking SMTP connections from dynamic IP address space X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Jun 2004 15:11:43 -0000 Just make sure they are truly dynamic ips. Many people block ips identified as "DSL" connections. Those are not necessarily dynamic ip based. My mail server runs on a business package dsl with 5 static ips. Not everyone can afford T1/T3 connections. As for getting a "real mail server", that would involve colo or getting a T1. My dsl package is only ~$50 a month. Much cheaper than colo and I can get physical access to the box whenever I want. SBC allocates separate class C's for dedicated customers. I'm sure its possible to distingish the two. As for the 550: Spammer message, that is definetely on the other end. Some anti-spam add-ons for mail servers automatically reject mail like this. In addition, admins often block specific domains or ip addresses manually in their config files. I have about 15 ips and domains in my sendmail config file because of repeat offenders who send spam or viruses.