I'm a big fan of Gnus, which is written in elisp and runs in emacs. It also supports email very nicely. Doesn't fit your vim-like request, but it does enable l

I'm a big fan of Gnus, which is written in elisp and runs in emacs. It also supports email very nicely. Doesn't fit your vim-like request, but it does enable living on the command line (particularly because one can start up emacs and not leave, and can run emacs in a GUI when necessary, with the exact same interface).