Dovecot
Dovecot is an open-source IMAP and POP3 email server software designed for Linux/Unix systems, focusing on security, performance, and simplicity. It handles email retrieval and storage, allowing users to access their mailboxes via standard email clients. It is widely used in production environments for its reliability and low resource consumption.
Developers should learn Dovecot when building or maintaining email infrastructure, such as setting up custom email servers for applications, organizations, or hosting services. It is particularly useful in scenarios requiring secure, scalable email access with support for modern standards like IMAP IDLE and Sieve filtering, making it ideal for system administrators and DevOps engineers managing mail services.