Postfix Outbound SPF Checker Idea

While working on figuring out a way to block email sent to and from external users, without blocking email to or from internal domain and allowing relay…. I had this idea:  What if I could check the SPF record of a domain when checking the from header of a domain.  This would allow me to dynamically permit emails from any Continue reading Postfix Outbound SPF Checker Idea

The Future of VoIP and Media over IP

Over the last few years I’ve started to see very little differences between email and phone systems and I was wondering if you see a trend going in this direction as well. Today: Email communication between 2 user is all done via DNS: MX (mail exchange) Records. Phone calls are done between 2 users via Telco providers, and then if Continue reading The Future of VoIP and Media over IP