Returned mail: Data format error

Dear user of 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 large amount of junk email during the last week.
Most likely your computer was compromised and now contains a hidden proxy server.

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

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