Mutt and NeoMutt are command-line email clients designed for Unix-like operating systems. They provide a fast, keyboard-driven interface for managing email via protocols like IMAP, POP3, and SMTP. Mutt is the original client, offering robust features and deep customization through configuration files. NeoMutt builds on Mutt by integrating additional modern features such as sidebar navigation, header caching, and Notmuch search support. Both clients are well-suited for users seeking a powerful, scriptable, and efficient email experience in the terminal.

Futurile.net has created a series of tutorials on how to configure this with Runbox among others, and we are sharing the tutorials here with their permission. 

NeoMutt: introduction to CLI email 

https://www.futurile.net/2025/05/17/neomutt-email-mailbox-tutorial 

NeoMutt: using IMAP and SMTP

https://www.futurile.net/2025/05/18/neomutt-email-native-imap-tutorial

NeoMutt: how to run multiple accounts with NeoMutt

https://www.futurile.net/2025/05/19/neomutt-multiple-accounts-tutorial

NeoMutt: Mirrored IMAP mbsync tutorial

https://www.futurile.net/2025/05/20/neomutt-mirror-imap-mbsync-tutorial