Because everything else works in a terminal, and my own mail client is so very scriptable. (Sure you can add hooks, and things to mutt, but once you have a mai

Because everything else works in a terminal, and my own mail client is so very scriptable. (Sure you can add hooks, and things to mutt, but once you have a mail client with a real integrated programming language it is hard to move back from. Mark all messages read? A single keystroke. Perform operations on messages that are less than 24 hours old, and contain a given token in the subject? Just a short function away.)