[GH-6366] Add functionality to disable Authentication when connecting to SMTP (#6639)

* Issue #6366: Add feature to disable auth for Encrypted connections to SMTP settings.

* Clean PLAIN AUTH Option

* Reorder SMTP server setup and change helptext

* remove unneeded setting and modify logic

* text description change

config/config.json

@@ -129,6 +129,7 @@
         "FeedbackName": "",
         "FeedbackEmail": "test@example.com",
         "FeedbackOrganization": "",
+        "EnableSMTPAuth": false,
         "SMTPUsername": "",
         "SMTPPassword": "",
         "SMTPServer": "dockerhost",
@@ -299,4 +300,4 @@
         "RunJobs": true,
         "RunScheduler": true
     }
-}
+}