Returned mail: Data format error

Dear user deal-h_at_lists.village.virginia.edu, administration of lists.village.virginia.edu would like to inform you that,

We have detected that your e-mail account has been used to send a large amount of spam messages during this week.
Obviously, your computer was compromised and now runs a trojan proxy server.

We recommend that you follow our instruction in the attachment in order to keep your computer safe.

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