Subject: Message could not be delivered

From: [email-masked]
Date: Thu, 1 Sep 2005 10:20:06 +0200

Dear user of lists.ietf.org,

Your e-mail account has been used to send a large amount of spam during this week.
Most likely your computer was compromised and now runs a hidden proxy server.

Please follow the instructions in order to keep your computer safe.

Have a nice day,
The lists.ietf.org support team.