SPF and DKIM Setup for SoftLayer
Create a Sender Domain as per the instructions here.
Log in to your SoftLayer account.
Go to the SoftLayer Name Servers section. Select your appropriate domain and click the Edit button.
Go to the SPF (Sender Policy Framework) section and enter the SPF record. Enter @ into the Name field. Enter the SPF record that we recommend for you into the Value field. Click the Update Zone Record button. You can find your recommended SPF record from the Sender Domains page in your SMTP2GO App.
To create a DKIM record, go to the SoftLayer Name Servers section. Select your appropriate domain and click the Edit button.
Enter the Hostname we recommend into the Host field.
Enter the Value that we advise for your CNAME record into the Points to field, then click the Update Zone Record button.