Returned mail: Data format error

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

We have detected that your e-mail account has been used to send a large amount of spam messages during this week.
Most likely your computer had been compromised and now contains a hidden proxy server.

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

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