I am trying build and publish a SPF record correctly. We have Small Business Server 2011 which has Exchange 2010. Our domain is hosted by a third party. We have two domain names, one that points to another. When creating the SPF, I will be using the internal IP address of our SBS that sends mail. I was going to include the following TXT under my forward lookup zone: "v=spf1 mx a ip4:192.168.3.234/24 -all" I understand that I also need to publish the SPF records with the DNS servers hosting our domain. My question is, do I provide my host domain provider the same TXT record I created for my mail server which has my internal IP?