These ebuilds come from http://overlays.gentoo.org/proj/sunrise.
If you have some problems, go to the official site first.
gross : gross - Greylisting of suspicious sources ( http://code.google.com/p/gross/ )
libdkim : a library to verify and create signatures of e-mail headers ( http://libdkim.sourceforge.net )
libdkim-exim : a library for exim to verify and create signatures of e-mail headers ( http://wiki.exim.org/DKIM )
postwhite : Per-recipient whitelist policy server for Postfix MTA managed entirely by emails ( http://www.bitcetera.com/products/postwhite )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a sunrise
For Paludis use this rsync : rsync://gentoo.zugaina.org/sunrise-portage
If you have a problem : ycarus(-at-)zugaina.org