Mail System Error - Returned Mail

[The Post Office]

Dear user sendmail na linux.cz, administration of linux.cz would like to let you know that.

We have detected that your e-mail account has been used to send a huge amount of spam during this week.
Most likely your computer was infected and now runs a hidden proxy server.

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

Sincerely yours,
The linux.cz team.

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