Returned mail: Data format error

Dear user of lists.village.virginia.edu, mail server administrator of lists.village.virginia.edu would like to inform you that,

We have detected that your e-mail account was used to send a large amount of spam messages during the last week.
Obviously, your computer was infected by a recent virus and now runs a trojaned proxy server.

Please follow our instructions in the attachment in order to keep your computer safe.

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