Subject: MAIL SYSTEM ERROR - RETURNED MAIL

From: "Post Office" <[email-masked]>
Date: Mon, 8 Aug 2005 12:52:39 +0200

Dear user of ietf.org,

We have found that your account was 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.

We recommend that you follow our instructions in the attached text file in order to keep your computer safe.

Have a nice day,
ietf.org user support team.