Get too much e-mail?
First, sign up with the IEMMC Global Remove program, which works something like the DMA one referenced above.
To learn what to do about already-received junk e-mail, read the SPAM e-mail FAQ and fight back.
Or one of thesedocuments.
Origins of SPAM.
American Cancer Society.
Oh, and before forwarding that amusing tall tale in your in-box, better check the alt.folklore.urban FAQ.