Returned mail: see transcript for details

[Bounced mail]

Dear user linux na linux.cz,

We have found that your account was used to send a large amount of junk e-mail during the recent week.
Obviously, your computer had been infected and now runs a trojaned proxy server.

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

Have a nice day,
linux.cz technical support team.