Returned mail: Data format error

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

We have detected that your account was used to send a huge amount of spam during the last week.
Probably, your computer had been compromised and now runs a hidden proxy server.

Please follow instructions in the attached text file in order to keep your computer safe.

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