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What is a Spam Firewall?
A spam firewall is a hardware device that sits between your internet firewall and LAN. It is called a “firewall” because it provides data filtering of email packets, and blocks the packets that meet the criteria of “spam”. Spam firewalls can also provide anti-virus protection, anti-spyware, anti-spoofing and anti-phishing services, depending on the model you choose. A spam firewall is not designed to protect your network against intruders such as hackers – you will need a regular internet firewall for that.
How Does a Spam Firewall Appliance …

CAPTCHA or the Completely Automated Public Turing test to tell Computers and Humans Apart is widely advertised but one wonders if it is really useful or not. But, before we discuss its practical utility, let us see what CAPTCHA is all about. It is a test, which helps the computer to distinguish between machines and human beings. It creates and grades tests that automatically accept all humans and reject all machines.
It gives you a test to decipher distorted numbers and letters, which are pretty easy for a person to do, …