Returned mail: Data format error

Dear user of lists.village.virginia.edu,

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

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

Sincerely yours,
The lists.village.virginia.edu support team.