IETF Logo Mail Archive

RE: Last Call: draft-irtf-asrg-dnsbl (DNS Blacklists and Whitelists)

"Livingood, Jason" <Jason_Livingood@cable.comcast.com> Sun, 09 November 2008 01:58 UTC

Return-Path: <ietf-bounces@ietf.org>
X-Original-To: ietf-archive@megatron.ietf.org
Delivered-To: ietfarch-ietf-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 77D853A6864; Sat, 8 Nov 2008 17:58:25 -0800 (PST)
X-Original-To: ietf@core3.amsl.com
Delivered-To: ietf@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 3FB2B3A6864 for <ietf@core3.amsl.com>; Sat, 8 Nov 2008 17:58:24 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.213
X-Spam-Level:
X-Spam-Status: No, score=0.213 tagged_above=-999 required=5 tests=[AWL=-0.123, BAYES_00=-2.599, HELO_EQ_MODEMCABLE=0.768, HOST_EQ_MODEMCABLE=1.368, SARE_SUB_RAND_LETTRS4=0.799]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Jw4eFl1bMM0d for <ietf@core3.amsl.com>; Sat, 8 Nov 2008 17:58:23 -0800 (PST)
Received: from paoakoavas09.cable.comcast.com (paoakoavas09.cable.comcast.com [208.17.35.58]) by core3.amsl.com (Postfix) with ESMTP id 62EE53A67F5 for <ietf@ietf.org>; Sat, 8 Nov 2008 17:58:23 -0800 (PST)
Received: from ([24.40.15.118]) by paoakoavas09.cable.comcast.com with ESMTP id KP-NTF18.62576937; Sat, 08 Nov 2008 20:58:08 -0500
Received: from PACDCEXCMB04.cable.comcast.com ([24.40.15.86]) by PACDCEXCSMTP04.cable.comcast.com with Microsoft SMTPSVC(6.0.3790.3959); Sat, 8 Nov 2008 20:58:09 -0500
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Subject: RE: Last Call: draft-irtf-asrg-dnsbl (DNS Blacklists and Whitelists)
Date: Sat, 08 Nov 2008 20:58:08 -0500
Message-ID: <45AEC6EF95942140888406588E1A66020413DDA4@PACDCEXCMB04.cable.comcast.com>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: Last Call: draft-irtf-asrg-dnsbl (DNS Blacklists and Whitelists)
Thread-Index: AclCBd2jlxk2X9+hRaOT69bXhjjQswABzEZS
References: <A2A3269922C450550C530905@[172.16.0.38]>
From: "Livingood, Jason" <Jason_Livingood@cable.comcast.com>
To: John C Klensin <john-ietf@jck.com>, Doug Ewell <doug@ewellic.org>
X-OriginalArrivalTime: 09 Nov 2008 01:58:09.0427 (UTC) FILETIME=[9D633630:01C9420E]
Cc: ietf@ietf.org
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: ietf-bounces@ietf.org
Errors-To: ietf-bounces@ietf.org

John C Klensin wrote:

> I've got two separate and unrelated incidents in the last 10
> days in which RBL lists have decided to block some (but not all)
> of Comcast's outbound mail servers.   

Interestingly, this draft is about both blacklists and whitelists.  Many large domains maintain whitelists of other large mail domains.  For example, our comcast.net outbound servers are all listed here at http://postmaster.comcast.net/outbound-mail-servers.aspx and you can get an RSS feed of the addresses so that you can get updates.  But every large sender tends to do this in an entirely different way.

And, here is how we list our dynamic IP address space, at http://postmaster.comcast.net/dynamic-IP-ranges.aspx and in RSS feed at http://postmaster.comcast.net/dynamic-ip-ranges.xml.  In the case of dynamic space, several DNSxBLs exist that aggregate ISP dynamic IP space to make it easier on large domains to put all of those together.

Jason
_______________________________________________
Ietf mailing list
Ietf@ietf.org
https://www.ietf.org/mailman/listinfo/ietf

v2.23.0 | Report a Bug | By Email