Create a Sender Profile
You can use a sender profile to specify the From information of an email message and a fallback address. This From information can then be reused over several email sends without having to specify the individual elements again. The fallback address must be a verified email address. To verify email addresses, use the REST API domain verification resources.
Use the sample code below as a model to construct your own API calls.
- Salesforce Help: Sender Profile
- REST API: Create Record in an Authenticated Domain