postfix での pop before smtp について

3.1	install postfix

3.2	install DRAC (Dynamic Relay Authorization Control)

http://mail.cc.umanitoba.ca/drac/index.html 


3. modify postfix /etc/postfix/main.cf.

        smtpd_recipient_restrictions =
            permit_mynetworks
            check_client_access hash:/etc/mail/dracd
            check_relay_domains
            reject

4. mkdir /etc/mail. 

dracd users the directory "/etc/mail".

5. run "rpc.dracd" as a daemon.