Mutt
Mutt is a free, open-source, text-based email client for Unix-like operating systems, known for its powerful features and high configurability. It operates primarily in the terminal, supporting protocols like IMAP, POP3, and SMTP, and integrates with external tools for tasks like mail retrieval and sending. Its minimalist interface and scripting capabilities make it popular among advanced users and system administrators.
Developers should learn Mutt when working in terminal-heavy environments, such as remote servers or development machines where GUI access is limited, as it provides efficient email management without graphical overhead. It's particularly useful for automating email workflows, handling large volumes of mail, or integrating with other command-line tools, making it ideal for scripting and system administration tasks.