For what it's worth, I use Mutt Patched from the Ubuntu repository. It gives me a side bar that lists all of my IMAP folders. Ctrl+n moves to the next folder and Ctrl+p moves to the previous folder.
I have this in my .muttrc file: # Sidebar set sidebar_width=30 set sidebar_visible=yes set sidebar_delim='|' set sidebar_sort=yes color sidebar_new brightblue black# b toggles sidebar visibility macro index b 'toggle sidebar_visible' macro pager b 'toggle sidebar_visible' bind index \CP sidebar-prev bind index \CN sidebar-next bind index \CO sidebar-open bind pager \CP sidebar-prev bind pager \CN sidebar-next bind pager \CO sidebar-open https://doc-0g-80-docs.googleusercontent.com/docs/securesc/ha0ro937gcuc7l7deffksulhg5h7mbp1/g7rtu2d3gqfs3uk5ensjkhnjhm20l6nb/1438617600000/08771943643953911230/*/0B05fj21T_0AtMndZZjlxSjh2V2c?e -- John
