Yeah...

I know I'd open an e-mail that had a .ppt attachment...

Honestly, I probably wouldn't even look at an e-mail that had anything more than basic HTML. Receiving e-mail with any attachments is a huge security risk. The messages won't get opened, and I know of a few antivirus programs that would probably pop up a nasty warning or delete the attachment.

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The best way to learn anything, is to question everything.