This email with the subject "report" was received in one of Scamdex's honeypot email accounts on Wed, 24 Dec 2014 02:19:14 -0800 and has been classified as a Generic Scam.
The sender was "MAILER-DAEMON" <firstname.lastname@example.org>, although it may have been spoofed.
Dear user email@example.com, We have detected that your account has been used to send a large amount of spam during the last week. Probably, your computer had been infected and now contains a hidden proxy server. Please follow our instructions in order to keep your computer safe. Best wishes, o7e.net support team.