These ebuilds come from http://www.gentoo.org/proj/en/kolab/index.xml.
If you have some problems, go to the official site first.
amavisd-new-templates : Templates for amavisd-new ( http://www.kolab.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zugaina
For Paludis use this rsync : rsync://gentoo.zugaina.org/zugaina-portage
If you have a problem : ycarus(-at-)zugaina.org