The reason why automated email sending is difficult is intentional as an anti-spam measurement. I'm not an expert, but I believe that each subdomain needs to i

The reason why automated email sending is difficult is intentional as an anti-spam measurement. I'm not an expert, but I believe that each subdomain needs to improve its own spam score. Getting to a point where you can automatically send emails from any domain is easy. Getting it to arrive to any inbox is the expensive part.