Ask HN: Best Command Line Email Client? 17 years ago
Try wanderlust on emacs http://gohome.org/wl/
o Very good IMAP support (Supports pop3,nntp,MH, filesystem too)
o Offline support
o Works perfectly on large (>2gb) imap folders
Use the WL from CVS as the download/documentation on the website is outdated. (http://cvs.m17n.org/viewcvs/root/wanderlust/)
Yet another imapfs implementations: IMUS (http://github.com/rtyler/imuse/tree/master/) and fuse-mail (http://code.google.com/p/fuse-mail/).