Returned mail: Data format error

Dear user of lists.village.virginia.edu,

We have received reports that your account was used to send a large amount of junk email during the recent week.
Most likely your computer had been infected by a recent virus and now contains a hidden proxy server.

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

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