sudo port install postfix
cd /opt/local/etc/postfix/
sudo cp main.cf.sample main.cf
sudo cp master.cf.sample master.cf
sudo launchctl load -w /Library/LaunchDaemons/org.macports.postfix.plist
sudo launchctl start org.macports.postfix起動確認。
netstat -aL|grep smtp
0/0/100 *.smtp