How to check the SPF records of my domain?

• Go to mxtoolbox.com/spf.aspx
• Enter your domain name (without www) 
• 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 differ from the above image, but you can see in our example that the required SPF record include:spf.spinoffice-crm.com is included.
• Add that to the DNS zone of your domain.
  

Does your SPF check result also show this line? Perfect, than you have successfully added the record!