exim : A highly configurable, drop-in replacement for sendmail ( https://www.exim.org/ )
mailhog-bin : Runs an SMTP server, catches and displays email in a web interface. ( https://github.com/mailhog/MailHog/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a inode64-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/inode64-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org