To authorize Addemar to send emails on your behalf you will have to include it in your SPF record. The SPF record mechanism used for Addemar is shown below.
For more information on setting up SPF for Addemar please click on the button below.
To set up DKIM you will have to generate the public and private DKIM keys yourself, add the public key to your DNS and then provide Addemar with the private key so that they can start signing your emails with it. For further information please click on the button below.
Create a free OnDMARC account to test your configuration.