Spam of the Future
Assuming they could solve the problem of the headers, the spam of the future will probably look something like this:
Hey there. Thought you should check out the following: http://www.27meg.com/foobecause that is about as much sales pitch as content-based filtering will leave the spammer room to make.
I recently recieved a spam email which shows that Graham may be right:
Get access to the largest free adult site on the net.
My friends, the spam of the future.