Spam
Spam is unsolicited e-mail on the Internet.
From the sender's point-of-view, it's a form of bulk mail,
often to a list culled from subscribers to a Usenet discussion group or obtained by companies
that specialize in creating e-mail distribution lists.
To the receiver, it usually seems like junk e-mail.
In general, it's not considered good netiquette to send spam.
It's generally equivalent to unsolicited phone marketing calls except
that the user pays for part of the message since everyone shares the cost
of maintaining the Internet.
Most often, SPAM is sendt using mail serveres that would relay mail from persons not authenticated by the server and most SPAM tries to hide the senders origon.
Anti-SPAM Tools: