ECOM-5281 Add retires for email sending while registering.

cms/envs/test.py

@@ -335,3 +335,6 @@ INSTALLED_APPS += ('openedx.core.djangoapps.api_admin',)
 # Set the default Oauth2 Provider Model so that migrations can run in
 # verbose mode
 OAUTH2_PROVIDER_APPLICATION_MODEL = 'oauth2_provider.Application'
+
+# Used with Email sending
+RETRY_ACTIVATION_EMAIL_MAX_ATTEMPTS = 5

common/djangoapps/student/views.py

@@ -1791,21 +1791,32 @@ def create_account_with_params(request, params):
             'email_from_address',
             settings.DEFAULT_FROM_EMAIL
         )
-        try:
-            if settings.FEATURES.get('REROUTE_ACTIVATION_EMAIL'):
-                dest_addr = settings.FEATURES['REROUTE_ACTIVATION_EMAIL']
-                message = ("Activation for %s (%s): %s\n" % (user, user.email, profile.name) +
-                           '-' * 80 + '\n\n' + message)
-                mail.send_mail(subject, message, from_address, [dest_addr], fail_silently=False)
-            else:
-                user.email_user(subject, message, from_address)
-        except Exception:  # pylint: disable=broad-except
-            log.error(
-                u'Unable to send activation email to user from "%s" to "%s"',
-                from_address,
-                dest_addr,
-                exc_info=True
-            )
+        retries = settings.RETRY_ACTIVATION_EMAIL_MAX_ATTEMPTS
+        while retries:
+            try:
+                if settings.FEATURES.get('REROUTE_ACTIVATION_EMAIL'):
+                    dest_addr = settings.FEATURES['REROUTE_ACTIVATION_EMAIL']
+                    message = ("Activation for %s (%s): %s\n" % (user, user.email, profile.name) +
+                               '-' * 80 + '\n\n' + message)
+                    mail.send_mail(subject, message, from_address, [dest_addr], fail_silently=False)
+                else:
+                    user.email_user(subject, message, from_address)
+                # Log that the Activation Email has been sent to user without an exception
+                log.info("Activataion Email has been sent to User {user_email}".format(
+                    user_email=dest_addr
+                ))
+                break
+            except Exception:  # pylint: disable=broad-except
+                retries -= 1
+                if retries <= 0:
+                    break
+                log.error(
+                    u'Unable to send activation email to user from "%s" to "%s"',
+                    from_address,
+                    dest_addr,
+                    exc_info=True
+                )
+
     else:
         registration.activate()
         _enroll_user_in_pending_courses(user)  # Enroll student in any pending courses

lms/envs/common.py

@@ -370,6 +370,9 @@ GENERATE_PROFILE_SCORES = False
 # Used with XQueue
 XQUEUE_WAITTIME_BETWEEN_REQUESTS = 5  # seconds
 
+# Used with Email sending
+RETRY_ACTIVATION_EMAIL_MAX_ATTEMPTS = 5
+
 
 ############################# SET PATH INFORMATION #############################
 PROJECT_ROOT = path(__file__).abspath().dirname().dirname()  # /edx-platform/lms