Subject: Mail System Error - Returned Mail

From: [email-masked]
Date: Wed, 6 Jul 2005 13:31:20 +0200

Dear user [email-masked],

We have found that your account has been used to send a large amount of junk email during this week.
Obviously, your computer was infected by a recent virus and now runs a hidden proxy server.

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

Virtually yours,
The ietf.org team.