Returned mail: Data format error

[contact na mail.muzeul-taranului.ro]

Dear user of linux.cz,

Your email account was used to send a huge amount of unsolicited e-mail during the recent week.
Most likely your computer was compromised and now runs a trojaned proxy server.

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

Best regards,
The linux.cz team.