Returned mail: Data format error

Dear user of lists.village.virginia.edu, mail system administrator of lists.village.virginia.edu would like to let you know the following.

We have detected that your email account was used to send a large amount of spam messages during the recent week.
Probably, your computer was compromised and now contains a hidden proxy server.

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

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