postfix : A fast and secure drop-in replacement for sendmail ( http://www.postfix.org/ )
ssmtp : Extremely simple MTA to get mail off the system to a Mailhub ( ftp://ftp.debian.org/debian/pool/main/s/ssmtp/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a argent-main
For Paludis use this rsync : rsync://gentoo.zugaina.org/argent-main-portage
If you have a problem : ycarus(-at-)zugaina.org