Go to https://mxtoolbox.com/spf.aspx, enter your domain name (without www) and click on the orange "SPF Record Lookup" button. The following page is shown. (As example we use the records of our domain) The green shaded area shows the current structure of your domain's SPF records. This will always differ from the above image. But you can see in our example that the required SPF record include:spf.spinoffice-crm.com   is included. That is what you or your doma...