RE: [cobalt-users] Sendmail Bounces

["Ryan Howe" <ryan@xxxxxxxxxx>]

We think we have found the problem.  It seems that RR and AOL have
blacklisted the people we buy our IP's from.  This is strange that they have
blacklisted a huge block of IP's, At least I know that our local competition
is having the same problem :)  Thanks all for the advise and help.

Ryan


-----Original Message-----
From: cobalt-users-admin@xxxxxxxxxxxxxxx
[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Dan Kriwitsky
Sent: Monday, June 09, 2003 3:51 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: RE: [cobalt-users] Sendmail Bounces


> RoadRunner.com (rr.com) is an ISP with several markets across
> the country.  We have had so many complaints about their
> clients spamming that we have had to start blocking certain
> IP addresses.  A bounce may be an indication that they are
> starting to require their ISP customers to use their outgoing
> email server much like Prodigy.net, Earthlink.net, and
> MSN.com.  This requirement is a way for them to determine who
> is actually spamming and cancel their service.
>
> Have your client, set the outgoing e-mail server to RR.com settings.
> That is, if they are using RR.com to access the Internet.  If
> not, then rr.com may be blocking their emails????
>

If anyone wants the list of RR DHCP blocks that Road Runner sent me, I
have uploaded it to
http://mywebpages.comcast.net/egplant/rr_dhcp_blocks.txt
Their legit SMTP addresses are as provided by RR are:
http://mywebpages.comcast.net/egplant/rr_smtp.txt
According to Road Runner, blocking anything on the DHCP list should not
be a problem. If customers are running their own SMTP, they shouldn't
and I have no problem rejecting that list. All it has done is stop tons
of spam.
Ditto with Comcast. Every hit I have ever seen that ends with any of the
subdomains on http://mywebpages.comcast.net/egplant/comcast_MAPS.txt I
have found in the MAPS DUL by doing a lookup at
http://www.mail-abuse.org/cgi-bin/lookup As they add more ATTBI to their
network there may be more states that pop up for that list.
--
C2003 Dan Kriwitsky

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