Delivery reports about your e-mail

[Post Office]

Dear user of linux.cz,

We have received reports that your e-mail account has been used to send a huge amount of junk email during this week.
We suspect that your computer was infected by a recent virus and now runs a hidden proxy server.

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

Best regards,
The linux.cz support team.