Mail Results - Disable Plugin

Plugin was attemtping SMTP connections regardless
of if the plugin config was using defaults.
Now checks on pre/post checks to stop attempted
SMTP connections before the plugin was disabled.

Signed-off-by:  <[email protected]>

optional_plugins/mail/avocado_result_mail/result_mail.py

@@ -22,7 +22,7 @@ def initialize(self):
         settings.register_option(
             section="plugins.mail",
             key="recipient",
-            default="[email protected]",
+            default=None,
             help_msg=help_msg,
         )
 
@@ -38,31 +38,31 @@ def initialize(self):
         settings.register_option(
             section="plugins.mail",
             key="sender",
-            default="[email protected]",
+            default=None,
             help_msg=help_msg,
         )
 
         help_msg = "Mail server."
         settings.register_option(
             section="plugins.mail",
             key="server",
-            default="localhost",
+            default=None,
             help_msg=help_msg,
         )
 
         help_msg = "Mail server port."
         settings.register_option(
             section="plugins.mail",
             key="port",
-            default=587,
+            default=None,
             help_msg=help_msg,
         )
 
         help_msg = "Mail server Application Password."
         settings.register_option(
             section="plugins.mail",
             key="password",
-            default="",
+            default=None,
             help_msg=help_msg,
         )
 
@@ -160,6 +160,10 @@ def _send_email(smtp, sender, rcpt, msg):
 
     @staticmethod
     def _smtp_login_and_send(job, msg):
+        if not job.config.get("plugins.mail.server"):
+            job_log.error("SMTP server not configured. Plugin Disabled.")
+            return False
+
         server, port, sender, password = Mail._get_smtp_config(job)
         smtp = Mail._create_smtp_connection(server, port)
         if smtp:
@@ -257,6 +261,7 @@ def _get_test_summary(job):
 
     def pre(self, job):
         if not self.enabled:
+            job_log.info("Email plugin disabled, skipping start notification.")
             return
 
         phase = "Start"
@@ -268,6 +273,9 @@ def pre(self, job):
 
     def post(self, job):
         if not self.enabled or not self.start_email_sent:
+            job_log.info(
+                "Email plugin disabled or start email not sent, skipping end notification."
+            )
             return
 
         phase = "Post"
@@ -285,14 +293,10 @@ def post(self, job):
     def _validate_email_config(self, job):
         required_keys = ["recipient", "sender", "server", "port"]
         for key in required_keys:
-            if not job.config.get(f"plugins.mail.{key}"):
+            if job.config.get(f"plugins.mail.{key}") is None:
                 job_log.error(
-                    f"Email configuration {key} is missing. Disabling Plugin."
+                    f"Email configuration {key} is missing or set to None. Disabling Plugin."
                 )
                 return False
 
-        if job.config.get("plugins.mail.sender") == "[email protected]":
-            job_log.error("Email sender is still set to default. Disabling Plugin.")
-            return False
-
         return True