Smtp built-in connector - How to return error message

[cveld]

Whenever the smtp built-in connector fails, how can we return the error message to the client?

[msitsoftware]

You can achieve it when you set the "Run after" Property of the following shape to "has failed".

In my example I used a simple Request-Response Pattern just to demonstrate. In the Response-Body you can get the error message via @outputs('Send_Email')