add postfix

target/packages/pkg-available/vpn-server

@@ -9,6 +9,8 @@ config ADK_PKG_VPN_SERVER
 	select ADK_PACKAGE_OPENNTPD
 	select ADK_PACKAGE_IPTABLES
 	select ADK_PACKAGE_ICINGA
+	select ADK_PACKAGE_NAGIOS_PLUGINS
+	select ADK_PACKAGE_POSTFIX
 	select ADK_PACKAGE_PHP
 	select ADK_PACKAGE_PHP_FASTCGI
 	select ADK_PACKAGE_LIGHTTPD