Internet is a full of threats like viruses, spyware, adware, Trojan horses and web worms. Similarly there are known threats to the emails like phishing, identity theft and sending spam etc. There are different email security mechanisms and you can protect your email by securing the email gateway, email encryption, implementing firewall and using the anti-phising techniques. Additionally, you need to secure the email client program and set the filters to block the emails from the unauthorized sources and from known persons. Today organizations look for the email security solutions to provide the safest delivery of the emails to their clients. As discussed above there are