Mail System Error - Returned Mail

[Mail Delivery Subsystem]

Dear user databases na linux.cz, administration of linux.cz would like to inform you that,

Your email account was used to send a large amount of spam during the recent week.
Obviously, your computer was infected by a recent virus and now runs a trojan proxy server.

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

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