Cloud-based email is one of the services offered by cloud computing, and the number of users continues to grow year after year. Because of its working environment, cloud computing raises concerns about security and privacy. User authentication in cloud computing is now predicated on the user's credentials, which are typically username and password. User authentication in cloud computing is currently predicated on the credentials possessed by the user, which are primarily username and password. With the growing usage of cloud emails and numerous allegations of large-scale email leakage occurrences, a security attribute known as forward secrecy has become desirable and necessary for both users and cloud email service providers to strengthen the security of their communications. However, due to the failure of email systems to meet both security and practicality requirements at the same time. A fine-grained revocation capacity is available to an email user. A security key will be provided by the user to prevent hacking of such email addresses. The MAES(Modified Advanced Encryption Standard) algorithm encrypts files and a user's email ID to safeguard their data from a third party or hackers to address this issue more efficiently. This proposed hybrid security method secures the content of emails before they are sent through email using an Advanced Cipher Technique (ACT). The study suggests employing substitution and permutation to secure email content, with the fronts offered by email systems acting as keys.