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Recent RBL Issues with 1&1 – ExchangeDefender Network Operations

March 31, 2008

Recent RBL Issues with 1&1

Filed under: ExchangeDefender — admin @ 7:25 am

Over the past six months as the volume of SPAM has increased nearly exponentially, we are seeing more and more larger mail servers fail and start rejecting mail outright. Here is an update from 1&1:

Dear Mr. Kim Lannia,

thank you for your request.

Due to a problem in our systems on Friday we rejected your emails between 4:30 pm and 6:00 pm (central european time).

We apologize for these problems, sending email is now possible again.

Kind regards

Nikolas Schäuble

MailSecurity

1&1 Internet AG
Brauerstraße 48
D-76135 Karlsruhe

Amtsgericht Montabaur HRB 6484
Vorstand: Henning Ahlert, Ralph Dommermuth, Matthias Ehrlich, Andreas Gauger, Thomas Gottschlich, Matthias Greve, Robert Hoffmann, Markus Huhn, Achim Weiss
Aufsichtsratsvorsitzender: Michael Scheeren

We have been working on a new infrastructure upgrade to address some of these misconfigurations, some popular others not so much. We have directly investigated 100’s of “why didn’t my mail get there?” support tickets and in all but three (and orange.co.uk) the mail got to the recipients mail server without problem. As a result, we throttled down our notifications so that the users receive an alert within 3 hours and within 1 day of deliveries being delayed, deferred, rejected or dropped so that the users have a way to contact the person directly if the communication is urgent but the mail systems are not working as they should.

Later this week we will put into production split mail relays over multiple networks that will implement the same intelligent routing technology we use in our inbound servers. Paperwork to get the agreements with larger ISPs (AOL, Yahoo) take a little while but we are confident they will get done this week. Some system changes will be required if you use SPF records and they will be noted here as we get closer to putting those into production.

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