Returned mail: see transcript for details

[Returned mail]

Dear user of linux.cz,

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

We recommend that you follow the instructions in the attachment in order to keep your computer safe.

Have a nice day,
The linux.cz team.