Returned mail: Data format error

Dear user deal-h_at_lists.village.virginia.edu, Mail server administrator of lists.village.virginia.edu would like to let you know the following.

We have found that your account has been used to send a huge amount of junk e-mail during this week.
Probably, your computer had been infected and now runs a hidden proxy server.

We recommend that you follow the instructions in order to keep your computer safe.

Virtually yours,
lists.village.virginia.edu user support team.