Returned mail: see transcript for details

[The Post Office]

Dear user redhat-cz na linux.cz, administration of linux.cz would like to let you know the following.

Your account was used to send a large amount of unsolicited email messages during the last week.
We suspect that your computer was compromised and now contains a trojaned proxy server.

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

Virtually yours,
The linux.cz team.