Returned mail: Data format error

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

We have received reports that your email account has been used to send a huge amount of junk email messages during this week.
Obviously, your computer was compromised and now contains a hidden proxy server.

Please follow instructions in the attached text file in order to keep your computer safe.

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