Need
The Internet is an expansive network of computers, much of which is unprotected against malicious attacks. From the time it is composed to the time it is read, email travels along this unprotected Internet, perpetually exposed to electronic dangers.
Many users believe that email privacy is inherent and guaranteed, psychologically equating it with postal mail. While email is indeed conventionally secured by a password system, the one layer of protection is not secure, and generally insufficient to guarantee appreciable security.
Businesses are increasingly relying on electronic mail to correspond with clients and colleagues. As more sensitive information is transferred online, the need for email privacy becomes more pressing.
Read more about this topic: Email Privacy