SPF & DKIM
Safescreening use Sendgrid as the underlying platform to send emails and as such support both SPF and DKIM, however, in order for them to generate the necessary DNS records you would have to reach out to them on the email address below.
Please let them know that as they are sending emails on behalf of your domain they will have to provide you with both SPF and DKIM DNS records for you to publish on your DNS side.