Nowadays, the development of innovative technology has emerged, particularly in mobile phones. People are often using smartphones daily in almost every aspect of their lives to use different applications and share various types of information quickly while moving anywhere. Mobile’s email applications are classified as one of the important applications to communicate ubiquitously since the use of email is considered as the best formal way for communication inside any organization. Due to this importance of e-mail and the daily needs of using it especially for faculty members and students, we propose to develop a mobile application for KFU E-Mail system with secure data transmission. The proposed application has encryption and decryption features to ensure security. As a result, the students and faculty members can communicate via the email application in a safer and more comfortable way. Manuscript profile