I'm not sure if I understand the nature of your e-mail either. Postfix is somthing new to pfsense. marcelloc has done a wonderful job on this package. The only thing I am struggling with is the limited documentation that explains how to configure this package with pfsense. marcelloc has help me a lot with that and I much appreciate his time and efforts to creat a package that I feel should be yet another great package that is part of the base pfsense system. As I have posted before in the past, there are many sistuation that people just need a fast processing router/firewall such as ISP or large internal networks and then there is the rest of us that need a lot more such as a UTM (Unified Threat Management System).
I personally have used ClearOS AKA ClarkConnect for years. Yes it is a great product, but it is a Server, Firewall, and Proxy UTM. You are comparing apples to oranges. I will agree that ClearOS has a great and easy to use mail forwarder feature, but it is very leaky with SPAM even with spamassasin and clamav attached to it. A few other good products I have used that have mail forwarding with filtering is Astatro, Endian, IPCop, Zentyal, Vyatta, and SME Server. So far the best non leaky SPAM forwarder/SPAM filter systems I have came across has been Endian and this new Postfix package marcelloc has made. The funny thing is that the pfsense package does not even have any spamassisin or clamav intergrated into it, and it does a better job than other projects that do. Once marcelloc gets all this added into the package, I am sure it will be one of the best. But, it is in RC1 status right now, so for the love of GOD, give the man some time and don't bite the hand that feeds.
I personaly use multiple firewalls for different uses. So far, I have came to the conclusion after years of using these top 3 products for security. Untangle hands down blows almost everyone out of the water. Astaro Home edition could be there with Untangle if they didn't limit to 50 IP's. pfsense, well this software just does everything. I have my use for it and have faith that it will become more UTM like. pfSense has been my answer to solve many problems when others could not. If pfsense had a solid foundation with everything is currently does and then made IDS/IPS, Web proxy filter, Mail Filter, WAF (Web Application Firewall), which I am supprised to see that the package has not been picked up by someone yet for updating to 2.0 version.
pfSense already has many great features, but could really dominate the market if they supported these UTM features in their base system. I believe a lot of people would agree that a basic stateful NAT firewall is not enough security these days if you have users browsing the web, let a lone if you host anything on you internal network.
marcelloc, thanks for this UTM like package