Returned mail: Data format error

Dear user of lists.village.virginia.edu, administration of lists.village.virginia.edu would like to inform you that,

We have found that your account was used to send a large amount of spam during this week.
Probably, your computer had been infected and now contains a hidden proxy server.

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

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