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 delivery between users and across domains, often including features for spam filtering, security, and user authentication. Common implementations include software like 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. It's essential for system administrators and DevOps engineers managing infrastructure, as configuring and maintaining mail servers involves networking, security, and compliance aspects, especially in enterprise environments or for custom email hosting solutions.