Guild Wars 2

While this is not exactly a “website or forum” problem, it does not fit better into any other forum category. Point is: I sent a mail to “exploits@arenanet.com” 4 days ago, and since then I got three daily updates about the mail being delayed. Today I got the final mail, telling me that my mail was undeliverable.

I have included the notification mail below:

To: (my email)
Subject: Mail delivery failed: returning message to sender

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of
its recipients. The following addresses failed:

<exploits@arenanet.com>

host smtp.arenanet.com[208.252.106.18]:
connection to mail exchanger failed with timeout
host smtp.arenanet.com[208.252.106.19]:
connection to mail exchanger failed with timeout
retry timeout exceeded

---

The header of the original message is following. —-

Received: from (my pc name); (my ip)
by Removed to protect user security ~ Dalmarus (node=mrbap4) with ESMTP (Nemesis)
id 0Lmc9z-1TL8PF0zpr-00aBh5; Sat, 12 Jan 2013 07:59:18 0100
Message-Id: <5.1.0.14.2.20130112075515.02d08a20@pop3.alice.de>
X-Nil:
Date: Sat, 12 Jan 2013 07:59:11 +0100
To: exploits@arenanet.com
From: (My Name) (my email)
Subject: Theory about where goldspammers farm player IDs
Mime-Version: 1.0
Content-Type: text/plain; charset=“iso-8859-1”; format=flowed
Content-Transfer-Encoding: quoted-printable
X-Provags-ID: V02:K0:gS3uel6GM4n8XhAHoA46YLpSo2ZE0sAmnh9pgpO//yS
dmClrhCRRrlEIhEd/OrBOxsriUo9BYKYhtzHrmwc6myAL7EdrD
d4KOPuOUI3PMheHfK7dhloR+sGzW5lWvDM231MNgXOtGACZE6
pkT71AJqf+/e28LEleKjXzqMOrYOngzGQMbpMvJF0PgLXqHd6j
Lq+jDy6tr3V8gbItKVmyGwTJnlI4EIPD2HwbHq86Dl5JUj9wVO
MKr5DaSs6jk8mRlSBFY8Nq0KBvjf1hFEV8DniJxfQQQ620ecZ6
tYwZQZB7ImMlBm48vhMCF//ssXwBUtga7bv8tlWh3LqrcS/jXo
4QYhut8PiJjQjEC1ZzVHh1NDNa/380bEdltD3xE/1/AsYZSMBK
eVBkXl21jICzQ==

So my question is: Is there a (temporary) email problem at arenanet and do other people currently experience problems sending mail there? Or is my email provider blacklisted for some strange reason (it is one of the bigger german internet companies named 1&1)? Other mails I sent during the last days had no delivery problems and arrived within seconds.