mutt is my favourite MUA. See http://www.mutt.org for more info.
I use mutt with Maildir local mails storage. Maildirs are great (one file per message, no corruption risk), except that mutt doesn't cache mail headers. So opening a folder with thousands of messages can be quite slow and annoying. Michael Elkins wrote a patch that enables mutt to cache Maildir (and mh) folders emails' headers.
I slightly edited it, so that :
Here is the patch.
And here are the modified Debian packages (install with dpkg -i xxx) :
DISCLAIMER: please note that this software is provided as-is, without guarantee of any kind. Use at your own risks.
Last modified: 07 Mar 2003 17:45:41
Copyright (c) 2017 Nicolas Bougues (firstname.lastname@example.org)