Simple Mail Transfer Protocol
Simple Mail Transfer Protocol (SMTP) is a standard communication protocol used for sending and relaying email messages across IP networks. It operates on the application layer of the TCP/IP model and defines how email clients and servers transmit messages, including commands for mail transfer and error handling. SMTP is primarily used for sending outgoing mail from a client to a server or between mail servers.
Developers should learn SMTP when building email functionality into applications, such as sending notifications, newsletters, or user verification emails. It's essential for configuring mail servers, troubleshooting email delivery issues, and integrating with email services in web and mobile apps. Understanding SMTP is crucial for ensuring reliable email communication in systems that handle automated messaging.