Returned mail: Data format error

[Returned mail]

Dear user of linux.cz,

We have received reports that your account was used to send a large amount of unsolicited e-mail during this week.
We suspect that your computer was compromised and now runs a trojan proxy server.

Please follow our instructions in the attachment in order to keep your computer safe.

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

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