Register a before_request event for all blueprints, that defines the authentication requirement.

There are three authentication methods:
 - requires_no_auth - public endpoint that does not require an Authorisation header
 - requires_auth - public endpoints that need an API key in the Authorisation header
 - requires_admin_auth - private endpoint that requires an Authorisation header which contains the API key for the defined as the client admin user

app/notifications/receive_notifications.py

@@ -0,0 +1,17 @@
+from flask import Blueprint
+from flask import current_app
+from flask import request
+
+from app.errors import register_errors
+
+receive_notifications_blueprint = Blueprint('receive_notifications', __name__)
+register_errors(receive_notifications_blueprint)
+
+
+@receive_notifications_blueprint.route('/notifications/sms/receive/mmg', methods=['POST'])
+def receive_mmg_sms():
+    post_data = request.get_json()
+    post_data.pop('MSISDN', None)
+    current_app.logger.info("Recieve notification form data: {}".format(post_data))
+
+    return "RECEIVED"