OK so I have a question about how Spamhaus works. I read their site but there is something I don't understand so I will explain the scenario as clear as I can.
My Postfix email server is hosted with a company called ViUX and their IP address is not listed in any Spamhaus list what so ever from what I can tell. But the residential ISP my mail clients send mail from to the remote Postfix server appear to be on the Spamhaus PBL. This is not uncommon however my mail server is not the residential IP that's black listed so I don't understand why I tried to send the following email and got this message:
Code:
Failed Recipient: someone@brektek.org
Reason: Remote host said: 554 Service unavailable; Client host [vss155.webhosting-email.com] blocked by zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=74.235.192.80
Now above the 'client host' is listed as my remote mail provider but the IP is not from them, it's my residential IP that my mail client (Thunderbird) is originating the message to. So it goes like this:
Thunderbird (port 25) [74.235.192.80] > ViUX mail server (port 25) [64.38.48.101] > destination mail server.
Can anyone tell me then why my messages are being rejected via Spamhaus if my mail server IP is not blacklisted? The entire AT&T / Bell South block appears to black listed
here but how does this matter? I sent an email to my friends mail server and the headers are shown below:
Code:
Return-Path: <david@harbormarketinggroup.com>
X-Original-To: carlos@iamghost.com
Delivered-To: carlos@iamghost.com
Received: by mail.iamghost.com (Postfix, from userid 5001)
id 098F4207B4; Fri, 22 Oct 2010 13:55:34 -0400 (EDT)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.iamghost.com
X-Spam-Level:
X-Spam-Status: No, score=0.0 required=6.3 tests=none autolearn=ham
version=3.3.1
Received: from vss155.webhosting-email.com (vss155.webhosting-email.com [64.38.48.101])
by mail.iamghost.com (Postfix) with ESMTP id B25E1207AE
for <carlos@iamghost.com>; Fri, 22 Oct 2010 13:55:32 -0400 (EDT)
Received: from adsl-235-192-80.mco.bellsouth.net [74.235.192.80] by vss155.webhosting-email.com with SMTP;
Fri, 22 Oct 2010 13:54:27 -0400
From: "David Hawks" <david@harbormarketinggroup.com>
To: "'Carlos Mennens'" <carlos@iamghost.com>
References: <042001cb6c7b$f634be20$e29e3a60$@harbormarketinggroup.com> <50fbfa956c20765d2d504f52aae60dcd@iamghost.com> <027101cb6c82$6a673c90$3f35b5b0$@com> <e85bc20489fe467936523e09a120b85e@iamghost.com>
In-Reply-To: <e85bc20489fe467936523e09a120b85e@iamghost.com>
Subject: RE: Policy Database Created For Finance
Date: Fri, 22 Oct 2010 13:48:08 -0400
Message-ID: <003601cb7211$49b46240$dd1d26c0$@com>
MIME-Version: 1.0
Content-Type: text/plain;
charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: ActsiEWlogT11GVGRZCqoNd85tck+wFiP1aw
Content-Language: en-us
Can someone explain to me why mail from a mail server that's not blacklisted gets rejected based on the info above? I don't understand.