To authorize Hostgator to send emails on your behalf you will have to include it in your SPF record. The SPF record mechanism used for Hostgator is shown below.

include:websitewelcome.com

For more information on SPF set up for Hostgator please click on the button below.

For information on how to set up DKIM please click on the button below.

Create a free OnDMARC account to test your configuration.