[165666] in North American Network Operators' Group
Re: The block message is 521 DNSRBL: Blocked for abuse
daemon@ATHENA.MIT.EDU (Michael Schuler)
Wed Sep 18 12:54:36 2013
From: Michael Schuler <mike@schuler.me>
In-Reply-To: <3CD2C55A8CD6E74EB451AC934C8CCD319EA4C742@MBLocal02.abcsupply.com>
Date: Wed, 18 Sep 2013 11:53:59 -0500
To: NANOG <NANOG@abcsupply.com>
X-MailScanner-From: mike@schuler.me
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
My experience in the past is that it can take a good amount of time for ATT=
to remove you from their black list. It's been as short as 24 - 48 hours =
and as long as a couple weeks and required follow up contact with support. =
They're a big company and they get a lot of requests. I've not dealt with=
Network Solutions or their RBL list as far as how to get whitelisted. But=
it sounds like they manage it in a way where the recipient has to accept e=
mail from you. It's probably not practical but can you contact the recipie=
nts on Network Solutions via another method to have them whitelist you?=20
From the sounds of t the IP address you purchased was previously used by a =
spammer and now you're paying the price for it. Perhaps there are contacts=
on this list from ATT/Network Solutions that can contact you off list to h=
elp you resolve that.=20
Good luck!
Mike Schuler
a guy
On Sep 18, 2013, at 11:07 AM, NANOG <NANOG@abcsupply.com> wrote:
> We recently purchased new IP addresses from ARIN, with plans on using one=
of them for our external and internal email delivery. We set up a reverse=
lookup and a SPF record for the newly purchased IP to prevent being classi=
fied as spam. We tested the functionality of the PTR and SPF record succes=
sfully using varies internet tools like dnsstuff.com, mxtoolbox.com, and ki=
tterman.com. Unfortunately, when we send emails to any AT&T or Network Sol=
utions hosted email we are being block as a spam abuser. I checked varies =
spam database tools and our IP addresses are not listed, but we are still b=
eing blocked by both AT&T and Network Solution. The block message is 521 D=
NSRBL: Blocked for abuse. In an attempt to be proactive, I contacted Netwo=
rk Solution and was told that each recipient would have to request we be wh=
itelisted, and AT&T directed me to an online form that I submitted to be re=
moved from the blacklist. Unfortunately, we are still not able to send ema=
ils to either AT&T or Network Solutions hosted emails. Our mail server IP =
address is 74.112.99.25, which resolves to mail.abcsupply.com. Does anyone=
have any suggestions on where to turn next? Is it possible they are block=
ing us based on old information from the previous IP address block owner? =
Any help tracking this down would be appreciated.
>=20
>=20
> Derrick Wash
> Microsoft Systems Administrator
> ABC Supply Company Inc
> Office: (608)368-2214
> Fax: (608)363-0214
>=20
>=20
>=20
