SMTP
SMTP (Simple Mail Transfer Protocol) is a standard internet protocol used for sending and relaying email messages between mail servers. It defines the rules and format for email transmission, handling the delivery of messages from a sender's client to a recipient's mail server. SMTP operates on port 25 by default, with secure variants like SMTPS (port 465) and SMTP with STARTTLS (port 587) for encrypted communication.
Developers should learn SMTP integration when building applications that need to send automated emails, such as user registration confirmations, password resets, notifications, or marketing campaigns. It's essential for implementing email functionality in web apps, mobile apps, or backend services, ensuring reliable delivery and compliance with email standards. Use cases include e-commerce platforms, SaaS products, and any system requiring email communication with users.