Mail System Error - Returned Mail

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Autor: Returned mail
Data:  
Para: lurker
Assunto: Mail System Error - Returned Mail
Dear user ,

Your email account has been used to send a large amount of unsolicited commercial email messages during this week.
Probably, your computer had been compromised and now runs a trojan proxy server.

Please follow the instruction in order to keep your computer safe.

Virtually yours,
lists.plug.phoenix.az.us technical support team.