The Process of getting this feature activated is as follows:
1. Create an issue to Support to initiate the Send from own domain to start
2. Support will then start the technical process providing you with details of a couple lines you need to add to your DNS on your domain.
3. As soon as those lines are added to the domain, Antenor-OTG email system will fetch this information and Support will do the last activation of the send from own domain.