When Viruses Attack!
From this link, I found out that one of the mysterious e-mail I received was NOT spam, but a virus. Fortunately, I deleted it instead of opening it... I noticed the strange file extension on the attachment, you see...

The mass-mailing MyDoom virus has become the fastest spreading program to date and the damage could continue for months or years.

The virus, also known as Novarg and Mimail.R, spread quickly across the Internet on Monday, traveling as an e-mail attachment and infecting PCs whose users opened the malicious file...

The virus has programmed infected PCs to send data to the SCO Group's Web server between Feb. 1 and Feb. 12. The SCO Group has incurred the wrath of the Linux community for its claims that important pieces of the open-source operating system are covered by SCO's Unix copyrights. IBM, Novell and other Linux backers strongly dispute the claims...

The virulent program has flooded the Internet with e-mail messages bearing the program, doubling the time it takes most major Web sites to deliver a page. About one in every 12 messages being sent through the Internet contains the virus, said e-mail service provider MessageLabs. The previously most prevalent mass-mailing virus, called Sobig.F, only accounted for one out of every 17 e-mail messages...

The message sports one of several different random subject lines, such as "Mail Delivery System," "Test" or "Mail Transaction Failed." The body of the e-mail contains an executable file and a statement such as: "The message contains Unicode characters and has been sent as a binary attachment." and "The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment."

Ain't technology grand?