* To setup qmail to run out-of-the-box on your system, run:
 * ebuild /var/db/pkg/mail-mta/qmail-1.03-r13/qmail-1.03-r13.ebuild config

 * To start qmail at boot you have to add svscan to your startup
 * and create the following links:
 * ln -s /var/qmail/supervise/qmail-send /service/qmail-send
 * ln -s /var/qmail/supervise/qmail-smtpd /service/qmail-smtpd

 * To start the pop3 server as well, create the following link:
 * ln -s /var/qmail/supervise/qmail-pop3d /service/qmail-pop3d

 * Additionally, the QMTP and QMQP protocols are supported,
 * and can be started as:
 * ln -s /var/qmail/supervise/qmail-qmtpd /service/qmail-qmtpd
 * ln -s /var/qmail/supervise/qmail-qmqpd /service/qmail-qmqpd

 * Additionally, if you wish to run qmail right now, you should
 * run this before anything else:
 * source /etc/profile

How to setup so you can send mail from localhost, or relay from certain ips:

edit /etc/tcp.smtp
add:
	127.0.0.1:allow,RELAYCLIENT="",RBLSMTPD=""
	69.2.251.81:allow,RELAYCLIENT="",RBLSMTPD=""
	192.168.0.1:allow,RELAYCLIENT="",RBLSMTPD=""
	:allow

reading the instructions makes sense, too.

once finished, in /etc/ run:
# tcprules tcp.smtp.cdb tcp.smtp.temp < tcp.smtp
# /etc/init.d/svcscan restart

and you should be gtg!