I need to alter a Postfix instance to only allow connections from Google's "Postini" service; specifically from the IP range:
18.104.22.168 - 22.214.171.124
From their docs, it seems I have to:
1. In the file /etc/postifix/main.cf file, set "mynetworks" to include all trusted local relay nets and the message security service's IP range.
2. Set: smtpd_client_restrictions = permit_mynetworks, reject.
Of these, the one I'm having trouble with is formatting the IP range above into something that makes sense to Postfix. Can anyone help?