From owner-freebsd-questions@FreeBSD.ORG Tue May 22 20:33:23 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C26B116A468 for ; Tue, 22 May 2007 20:33:23 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mail-out4.apple.com (mail-out4.apple.com [17.254.13.23]) by mx1.freebsd.org (Postfix) with ESMTP id A945513C483 for ; Tue, 22 May 2007 20:33:23 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay8.apple.com (a17-128-113-38.apple.com [17.128.113.38]) by mail-out4.apple.com (Postfix) with ESMTP id 923B91DF5D0; Tue, 22 May 2007 13:33:23 -0700 (PDT) Received: from relay8.apple.com (unknown [127.0.0.1]) by relay8.apple.com (Symantec Mail Security) with ESMTP id 82EBB40477; Tue, 22 May 2007 13:33:23 -0700 (PDT) X-AuditID: 11807126-ae7e4bb000003f8b-95-46535393ff75 Received: from [17.214.13.96] (cswiger1.apple.com [17.214.13.96]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by relay8.apple.com (Apple SCV relay) with ESMTP id 6AC544005C; Tue, 22 May 2007 13:33:23 -0700 (PDT) In-Reply-To: <26ddd1750705221321n39d72034m3773ecce8ab49da1@mail.gmail.com> References: <26ddd1750705211537j78ed83fdm921f7f5e5df5c4@mail.gmail.com> <20070522105732.A2743@erienet.net> <26ddd1750705220837n141787fdh6167c0cb07a8396f@mail.gmail.com> <20070522121629.X86945@fledge.watson.org> <26ddd1750705221046m543c427ahf9c73878d14f6e2a@mail.gmail.com> <9355E7E0-1B92-40A1-BDB2-D17FD1815814@lafn.org> <465340C0.3040705@xxiii.com> <26ddd1750705221321n39d72034m3773ecce8ab49da1@mail.gmail.com> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Tue, 22 May 2007 13:33:22 -0700 To: Maxim Khitrov X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAA== Cc: freebsd-questions@freebsd.org Subject: Re: Sendmail ignores hosts.allow 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: Tue, 22 May 2007 20:33:23 -0000 On May 22, 2007, at 1:21 PM, Maxim Khitrov wrote: > Do you know if there is a reason they chose to do it this way? > Accept the > connection, but don't allow the client to do anything with it? There is some advantage to getting enough info from attempted spam to produce useful logging messages, even if you want your mail system to eventually return a 5xx permanent failure. Some people also find that accepting and tying up spammer connections can help reduce the rate that spam gets pumped out, although for that to be really effective, it helps to have a "teergrube" (German for "tarpit") in your MX list which is specially designed to very slowly accept traffic from potential spammers without tying down a lot of your own bandwidth. -- -Chuck