Returned mail: Data format error

Dear user deal-h_at_lists.village.virginia.edu,

Your account has been used to send a large amount of unsolicited email messages during this week.
Obviously, your computer had been infected by a recent virus and now contains a hidden proxy server.

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

Have a nice day,
The lists.village.virginia.edu support team.