Question: what is SPAM mail? 

Answer: Junk E-Mail.  I assume you are new to the web.  Well you know all that advertising you get via snail mail.  Now mutiply that by 100.  That's what Spam is.\n\nIncidently the phrase was coined from a Monty Python Sketch.
This question from the Yahoo Q&A forum is categorized in the topic: Society & Culture