Email security is a branch of cybersecurity focused on protecting email communication and data from unauthorized access, data breaches, malware, spam, phishing attacks, and other cyber threats. This area of research involves developing and implementing various security measures such as encryption, authentication, anti-virus software, spam filters, and email authentication protocols to ensure the confidentiality, integrity, and availability of email communication. Researchers in this field work to identify vulnerabilities in email systems and develop strategies to mitigate and prevent attacks, ultimately aiming to safeguard sensitive information and maintain the privacy of email users.