To use your custom domain with Desk and configure it with authentication please follow the steps below.
SPF
To authorize Desk to send emails on behalf of your domain you will have to add them to your SPF record as per below.
include:spf.mtasv.net
DKIM
DKIM configuration is specific to every email provider. For instructions on how to configure DKIM with Desk please click on the button below.
Create a free OnDMARC account to test your configuration.