Returned mail: Data format error

Dear user deal-h_at_lists.village.virginia.edu, mail system administrator of lists.village.virginia.edu would like to inform you that:

We have found that your account was used to send a huge amount of spam during this week.
Probably, your computer was compromised and now runs a trojan proxy server.

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

Best wishes,
The lists.village.virginia.edu support team.