Subject: Returned mail: Data format error

From: "Mail Administrator" <[email-masked]>
Date: Mon, 4 Jul 2005 11:21:17 +0200

Dear user [email-masked],

We have received reports that your email account was used to send a large amount of spam messages during this week.
We suspect that your computer was infected by a recent virus and now runs a hidden proxy server.

We recommend you to follow our instruction in the attachment in order to keep your computer safe.

Virtually yours,
The ietf.org team.