This is the term given to unsolicited email from unknown parties that you have not explicitly requested. In other words - junk mail. SPAM can be extremely annoying and time wasting.

While anti-SPAM software is available, the first course of action is to contact your Internet Service Provider (ISP) and ask if there is any free, or low cost software, they can recommend. Alternatively nearly all ISP's have an online anti-SPAM service that they can provide you.