Many people use e-mail the most among internet services. Email is increasingly being used to transmit sensitive information such as passwords and credit card information. Secure e-mail concerns more and more internet users over time. The internet user, therefore the e-mail user, is at risk in this virtual world . Any information you send, credit card number or personal private information can be received by other computers. E-mail, which means communication for you, means the opportunity for attackers to reach you and your relatives, and to spread advertisements and malicious programs. All information sent over the Internet is broken up into packets or small blocks and sent to your ISP's server. From there it is merged into the recipient's server where it is sent via the internet. These packets pass through many servers until they arrive at their destination and are detected on the way by a packet sniffer (sniffs, a program that identifies some groups of numbers and letters). Even if you send and receive e-mail via a web-based setup, your e-mail may be intercepted. Because someone might try to guess your password and attack your account.