One of my sisters sent me a very interesting optical-illusion e-mail recently. I enjoyed it quite a bit. But like most such messages that I see, it was forwarded, and had several different headers, and all of the e-mail addresses it had ever been sent to were intact and visible in them.

People… please, please, please don’t make it easier for spammers to get the e-mail addresses of your friends and family. If you really must forward a message, or send out a mass e-mail of your own, do it the smart way: use the BCC field instead of the TO or CC fields, and strip off any previous forwarding headers before you send it.