The final front in the war on spam is the elimination of e-mail in the traditional sense. Many businesses are being forced to take this approach. Even the White House has been forced to follow this path. Today, if you want to send e-mail to the president of the United States, you do it by filling out an online form. Even HowStuffWorks has been forced to use forms. It used to be that you could send e-mail directly to individual HowStuffWorks staff and departments, but those e-mail addresses started to receive so much spam that we now use a set of online forms, instead.
That may be what happens to all e-mail in the long run. The amount of spam, and the inability to control that spam, may become so unmanageable that the traditional e-mail system we know today collapses and gets replaced either with forms or with a set of advanced, secure servers that put spammers out of business.
I was reading howstuffworks.com again. This time about spam.