To authorize Adestra to send emails on your behalf, you will need to publish the following SPF mechanism in your SPF record:

However, if you use Delegated Domains, you will not need to add any SPF mechanisms.

If you are using CNAME or NS delegation, these records will be served by the Adestra DNS server automatically.

Adestra supports DKIM signing for your custom domain. 

For more information on DKIM please click on the button below.

Create a free OnDMARC account to test your configuration.