Exception handling and logging for SMTP errors

Should mitigate internal server errors if SMTP server fails.

ref-test/app/models/entry.py

@@ -6,6 +6,7 @@ from .test import Test
 
 from flask_login import current_user
 from flask_mail import Message
+from smtplib import SMTPException
 
 from datetime import datetime, timedelta
 from uuid import uuid4
@@ -174,4 +175,7 @@ class Entry(db.Model):
             <p>Best wishes, <br/> SKA Refereeing</p>
             """
         )
-        mail.send(email)
+        try: 
+            mail.send(email)
+        except SMTPException as exception:
+            write('system.log', f'SMTP Error when trying to notify results to {self.get_surname()}, {self.get_first_name()} with error: {exception}')