From owner-freebsd-questions@FreeBSD.ORG Thu Apr 21 23:47:38 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 828061065670 for ; Thu, 21 Apr 2011 23:47:38 +0000 (UTC) (envelope-from gull@gull.us) Received: from mail-ew0-f54.google.com (mail-ew0-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id 240CB8FC13 for ; Thu, 21 Apr 2011 23:47:37 +0000 (UTC) Received: by ewy1 with SMTP id 1so74910ewy.13 for ; Thu, 21 Apr 2011 16:47:37 -0700 (PDT) MIME-Version: 1.0 Received: by 10.14.9.224 with SMTP id 72mr165523eet.95.1303429656997; Thu, 21 Apr 2011 16:47:36 -0700 (PDT) Received: by 10.14.47.143 with HTTP; Thu, 21 Apr 2011 16:47:36 -0700 (PDT) X-Originating-IP: [64.81.163.112] In-Reply-To: <20110421095143.7f10b67b@scorpio> References: <20110421120035.3C3151065761@hub.freebsd.org> <20110421223143.Y43371@sola.nimnet.asn.au> <20110421095143.7f10b67b@scorpio> Date: Thu, 21 Apr 2011 16:47:36 -0700 Message-ID: From: David Brodbeck To: FreeBSD Content-Type: text/plain; charset=ISO-8859-1 Subject: Re: How to be an imap Client? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Apr 2011 23:47:38 -0000 On Thu, Apr 21, 2011 at 6:51 AM, Jerry wrote: > No humor intended. I have read another post that might also describe > why the network is being blacklisted. I firmly believe that a diligent > SA (note the word diligent) could attempt to correct this problem. One of the things about working in a university environment is top-level network policies are often set by a separate campus-wide entity; sysadmins working on the department level often have no control over this. So the blacklisting decision may not be something he has the power to change. Also keep in mind that in a lot of university environments network access is uncontrolled. Where I work students can plug into any network jack and have full access. They do make an effort to react to and shut down compromised machines, but I can see why blacklisting IPs that aren't intended to have mail servers on them might seem like a reasonable proactive measure. There are blacklists that attempt to contain all home cable and DSL IP blocks for exactly this reason.