Courier IMAP
Courier IMAP is an open-source IMAP and POP3 server software designed for Unix-like systems, providing mail storage and retrieval services. It's part of the Courier Mail Server suite and is known for its security features, including native SSL/TLS support and authentication mechanisms. The server stores emails in Maildir format, making it compatible with various mail clients and webmail interfaces.
Developers should learn Courier IMAP when setting up or maintaining email servers for applications that require reliable mail storage and access, such as web hosting environments, enterprise email systems, or custom mail solutions. It's particularly useful in scenarios where security and compatibility with standard mail protocols (IMAP4rev1, POP3) are critical, and its integration with the broader Courier suite simplifies mail server management.