dovecot-fts-xapian : Dovecot FTS plugin backed by Xapian ( https://github.com/grosjo/fts-xapian )
hydroxide : A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge ( https://github.com/emersion/hydroxide )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a guru
For Paludis use this rsync : rsync://gentoo.zugaina.org/guru-portage
If you have a problem : ycarus(-at-)zugaina.org