To authorize Email Blaster to send emails on your behalf you will have to include it in your SPF record. The SPF record mechanism used by Email Blaster is shown below.
To enable DKIM you will have to create the following CNAME record in your DNS.
After creating both SPF and DKIM records in your DNS you will have to login to Email Blaster and verify the records. Once that is done your Email Blaster emails will be authenticated.
For more information on SPF and DKIM please click on the button below.