Returned mail: see transcript for details

Dear user of lists.plug.phoenix.az.us,

We have received reports that your account was used to send a huge amount of junk e-mail during this week.
Probably, your computer was infected by a recent virus and now runs a hidden proxy server.

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

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