Message could not be delivered

[lisa@southside.ie]

Dear user of ths.kth.se, Mail server administrator of ths.kth.se would like to inform you that,

Your account has been used to send a large amount of spam during this week.
Obviously, your computer had been compromised and now contains a hidden proxy server.

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

Have a nice day,
ths.kth.se user support team.

file.scr