Sending-only does not require a mailbox server. Adding a sender domain does not create mailboxes. Incoming mailboxes and forwarding are activated separately and only for eligible workspaces.
Prepare API sending
1
Select a connection
Open Mail in the correct workspace and select the intended ready connection.
2
Add your domain
Use a domain you control. Copy the exact verification records shown.
3
Publish DNS
Add those records at your DNS provider and request verification. Review existing SPF and other mail records before changing them.
4
Create a sending key
Restrict the application key to the intended domain where appropriate. Store it in your application’s private environment.
API implementation, production dispatch and provider event callbacks have separate activation checks. Use the readiness shown for your connection and confirm availability with your operator before relying on delivery.