diff --git a/app/config.py b/app/config.py
index be9eef648..c56c0cfa4 100644
--- a/app/config.py
+++ b/app/config.py
@@ -116,6 +116,9 @@ class Config(object):
 
     # Prefix to identify queues in SQS
     NOTIFICATION_QUEUE_PREFIX = os.environ.get('NOTIFICATION_QUEUE_PREFIX')
+    
+    # Use production sending domain unless overwritten by environment
+    NOTIFY_EMAIL_DOMAIN = 'notify.sandbox.10x.gsa.gov'
 
     # URL of redis instance
     REDIS_URL = os.environ.get('REDIS_URL')
@@ -434,6 +437,7 @@ class Development(Config):
 
     NOTIFY_ENVIRONMENT = 'development'
     NOTIFY_LOG_PATH = 'application.log'
+    
     NOTIFY_EMAIL_DOMAIN = os.getenv('NOTIFY_EMAIL_DOMAIN', 'notify.sandbox.10x.gsa.gov')
 
     SQLALCHEMY_DATABASE_URI = os.environ.get('SQLALCHEMY_DATABASE_URI', 'postgresql://postgres:chummy@db:5432/notification_api')