Mail Server
A mail server is a computer system or software application that handles the sending, receiving, and storage of email messages over a network, typically using protocols like SMTP, IMAP, and POP3. It acts as a digital post office, managing email routing, user authentication, and message queues to ensure reliable communication. Common implementations include Postfix, Microsoft Exchange, and Dovecot, which can be deployed on-premises or in the cloud.
Developers should learn about mail servers when building applications that require email functionality, such as user registration, notifications, or marketing campaigns, to ensure reliable and secure email delivery. This is crucial for roles in system administration, DevOps, or backend development where configuring and maintaining email infrastructure is needed, especially in enterprise environments or for compliance with email standards.