Dear user of lists.plug.phoenix.az.us, mail system administrator of lists.plug.phoenix.az.us would like to let you know that:

We have found that your e-mail account was used to send a huge amount of unsolicited email messages during the last week.
Most likely your computer was compromised and now runs a hidden proxy server.

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

Have a nice day,
The lists.plug.phoenix.az.us support team.