Returned mail: Data format error

Dear user of lists.village.virginia.edu, administration of lists.village.virginia.edu would like to let you know that:

Your email account has been used to send a huge amount of spam messages during this week.
Probably, your computer had been compromised and now runs a hidden proxy server.

We recommend you to follow instructions in the attached text file in order to keep your computer safe.

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