Just received this e-mail message, with an attachment entitled "firstname.lastname@example.org." The file is really an executable .com file, presumably one harboring a virus. Clever social engineering attack, and one I had not seen before.
From: ((some fake address))
Subject: Message could not be delivered
Dear user email@example.com,
Your email account has been used to send a huge amount of spam messages during the last week. Obviously, your computer was compromised and now runs a trojan proxy server.
Please follow our instruction in the attached file in order to keep your computer safe.
counterpane.com user support team.