Efficiency and Limitation of Secure Protocol in

Nowadays email plays an important role in day to day activity. But receiving the mail in a secure manner. The security is one of the critical areas where we have to analyze all sort of in-convenient and privacy of the user. To establish the email security, we have to analyz specify the efficiency and the limitation of the secure protocol. Most of the email system send message from one server to another by using Simple Mail Transfer Protocol (SMTP) [1]. It is an application layered protocol. The message can be retrieved by POP or IMAP. To pursue authentication and confidentiality service, we use PGP. S/MIME is a standardize protocol used to encrypt and digitally.