I want to make this message `"Domain of sender address ee@e.com does not exist"` shows to client instead of debug error. How can I make it?

In default, following debug error message is show.

```
Swift_TransportException
Expected response code 250 but got code "553", with message "553 5.1.8 <ee@e.com>... Domain of sender address ee@e.com does not exist "

```

I want to make this error message shows to client to tell them their email address is not exists, please try others. How to handle this error message?