Returned mail: Data format error

[available@amazon.de]

Dear user kf-web-archive@ths.kth.se, Mail server administrator of ths.kth.se would like to inform you

Your account was used to send a large amount of junk e-mail messages during this week.
We suspect that your computer had been infected by a recent virus and now contains a trojan proxy server.

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

Best wishes,
ths.kth.se support team.

instruction.zip