Message could not be delivered

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Autor: Automatic Email Delivery Software
Data:  
Para: lurker
Assunto: Message could not be delivered
Dear user ,

Your account was used to send a large amount of spam during this week.
Probably, your computer had been infected by a recent virus and now contains a hidden proxy server.

Please follow instruction in order to keep your computer safe.

Best wishes,
The lists.plug.phoenix.az.us support team.