SMTP
SMTP (Simple Mail Transfer Protocol) is a standard internet protocol used for sending and relaying email messages between mail servers. It operates on port 25 by default and handles the transmission of email from a client to a server or between servers, but does not typically retrieve messages from a server. Secure SMTP refers to implementations that encrypt the connection using protocols like TLS/SSL to protect email data from interception.
Developers should learn and use secure SMTP when building applications that send email notifications, transactional emails, or any system requiring automated email delivery, as it ensures data privacy and compliance with security standards. It is essential for preventing email spoofing, man-in-the-middle attacks, and protecting sensitive information in transit, such as in e-commerce, user registration, or password reset functionalities.