Create and manage Email Communication Service resource in Azure Communication Service
https://learn.microsoft.com/en-us/azure/communication-services/quickstarts/email/create-email-communication-resource
How to connect a verified email domain with Azure Communication Service resource
https://learn.microsoft.com/en-us/azure/communication-services/quickstarts/email/connect-email-communication-resource
Please provide the valid information for the below site properties:
Connection string from Azure
Sender email from Azure