davmail-bin : POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 Gateway ( https://davmail.sourceforge.net/ )
mu : Set of tools to deal with Maildirs, in particular, searching and indexing ( https://www.djcbsoftware.nl/code/mu/ https://github.com/djcb/mu )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a AstroFloyd
For Paludis use this rsync : rsync://gentoo.zugaina.org/AstroFloyd-portage
If you have a problem : ycarus(-at-)zugaina.org