Abstract: Email, sometimes written as e-mail, is simply the shortened form of “electronic mail,” a system for receiving, sending, and storing electronic messages. It has gained nearly universal popularity around the world with the spread of the Internet. In many cases, email has become the preferred method for both personal and business communication. So, enhance the security provision in essential to maintain integrity and confidentiality of data. Currently the system offers only OTP as an additional verification during email transactions. The current paper focuses on conducting a study on concept of email security and challenges.

Keywords: Handshaking Protocol, OTP, Captcha, Email Security.