A whitelist is the exact differing from blacklist. A whitelist is a predefined list of IP addresses that are allowed to send email to and receive email from each other. In the same way that blacklists exclude known and alleged spammers whitelists can be used to exclude everyone except verified IP addresses. To send email to a whitelist you must be approved and verified by the owner of the whitelist

If you need a portable spam fighting solution where you won't always have access to a PC then the challenge response based system offered by SpamArrest will suit you perfectly. SpamArrest combines a webmail and spam filtering solution for ease-of-use. This is my current tool of choice for fighting spam as it offers portability but can also be easily integrated with your current email software. This is my current tool of choice for fighting spam.

If you're looking for an affordable and effective spam blocking program that integrates seamlessly with your Outlook or Outlook Express setup then Qurb is the answer. Internationally recognized as a superior solution for stopping spam dead in its tracks Qurb is a great antispam solution.

If you want to scan your email before it ever arrives on your PC then Mailwasher Pro is the perfect solution for you. Most other spam blockers first have to download the mail to your PC before doing anything. Mailwasher Pro allows you to preview incoming mails and delete or bounce the ones you don't want to receive. Mailwasher Pro is a simple, effective solution to spam that doesn't depend on having Outlook or Outlook Express installed.

A good starting point where you can learn about the basics of spam is the Introduction section. Find out what Spam Blockers are available to you and proceed to read all about them under the Spam Blocker Reviews. Finally, don't forget to visit the articles section and learn about some of the Anti Spam Techniques in use today.

Once the victim becomes sure of the probable success of the deal, something goes wrong. The victim is then forced or threatened to provide one or more large sums of money to save the project. For example, an official will order an up-front bribe or an unanticipated tax or fee to the Nigerian government will have to be paid before the money can be transferred. Each fee paid is explained as the very last fee required. The plan may be stretched out over many months.

Heuristic filtering mechanism is subjecting email post through thousands of pre-defined rules against the communication envelope, header and content. Each rule assigns a mathematical score to the prospect of the message being spam. The result of the final equation is known as the Spam Score.

The spam score is then calculated against the user's preferred level of spam sympathy - whether low, medium or high sensitivity. Setting a higher level of sensitivity leads to more spam being capture, but has the adverse result of filtering justifiable emails as spam. This is known as a false-positive.

Based on the spam score and sensitivity threshold, the messages are organized into spam, not spam, and unsure folders. There as exceptions to this rule however :-

• Messages from senders on the accepted List is never considered spam
• Messages from senders on the barren List is always considered spam
• Messages trigger custom rules defined by the user is never considered spam.

Bayesian spam filters are "intelligent". Bayesian spam filters are intellectual so far as they're able of match up two sets of information and acting on the result. This is in direct distinction to the infinite mainstream of other spam filters who use pre-built rules to decide which e-mail is spam and which is not. Bayesian spam filters can take one group of justifiable e-mail and an additional group of spam and measure up to the values and data of each. The definition of legitimate e-mail that it creates at the end of this comparison session is what it uses going forward to scan your inbox for spam.