From owner-freebsd-questions@FreeBSD.ORG Tue Sep 18 00:25:13 2007 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 7EAAA16A419 for ; Tue, 18 Sep 2007 00:25:13 +0000 (UTC) (envelope-from chris@chrismaness.com) Received: from ns1.kq6up.org (adsl-76-238-148-145.dsl.irvnca.sbcglobal.net [76.238.148.145]) by mx1.freebsd.org (Postfix) with ESMTP id A5AEA13C46E for ; Tue, 18 Sep 2007 00:25:11 +0000 (UTC) (envelope-from chris@chrismaness.com) Received: from [192.168.1.2] ([192.168.1.2]) by ns1.kq6up.org (8.13.8/8.13.6) with ESMTP id l8I0P3CQ033620; Mon, 17 Sep 2007 17:25:05 -0700 (PDT) (envelope-from chris@chrismaness.com) Message-ID: <46EF1ADE.7020806@chrismaness.com> Date: Mon, 17 Sep 2007 17:25:02 -0700 From: Chris Maness User-Agent: Thunderbird 1.5.0.13 (X11/20070824) MIME-Version: 1.0 To: Chuck Swiger References: <46EF0243.4000604@chrismaness.com> <46EF0352.9050800@sequestered.net> <46EF0841.8070307@chrismaness.com> <4BF548AD-D73A-4822-85D0-B24B03F57E51@mac.com> In-Reply-To: <4BF548AD-D73A-4822-85D0-B24B03F57E51@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: FreeBSD-Questions List Subject: Re: SMTP Error from my server? 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, 18 Sep 2007 00:25:13 -0000 Chuck Swiger wrote: > On Sep 17, 2007, at 4:05 PM, Chris Maness wrote: >>> Looks to me like a failed sender verification callout-- these are >>> generally construed to be abusive. I can't easily tell from your >>> munging whether it's your server or Adelphia that's doing it, though. >> >> This is the only e-mail address that I am having this problem with, >> and it has been going on for a year or so now. What other info would >> you guys need to tell what it is. I guess I don't understand the >> whole "sender verification callout" I'll have to do a little google >> to find out. > > The idea is pretty simple: when someone sends you an email, you delay > accepting it until you can confirm that you can send a reply back to > the sending address, or more precisely, check whether you can do a > MAIL FROM: your domain and RCPT TO: the sender, and have it return OK, > without actually going into the DATA phase and delivering a test message. > > This idea works fine for normal email addresses, but fails miserably > with certain types of automated email which is not intended for people > to reply to, and it also tends to lose out with TDMA > (http://tmda.net/). More importantly, it also fails to work with > itself-- other people using "sender verification callouts" cause a > loop of failed deliveries, as neither side trusts the other. > > ---Chuck > Can I turn it off for this sender? Chris Maness