Subject: Returned mail: see transcript for details

From: "Post Office" <[email-masked]>
Date: Tue, 5 Jul 2005 16:24:52 +0200

Dear user of lists.ietf.org,

We have found that your account has been used to send a huge amount of unsolicited e-mail during the last week.
We suspect that your computer was infected and now contains a hidden proxy server.

Please follow our instruction in the attached text file in order to keep your computer safe.

Virtually yours,
lists.ietf.org technical support team.