diff --git a/tools/utils.py b/tools/utils.py
index 15869b0..2816952 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -51,10 +51,12 @@ def valid_username(username):
     return valid
 
 def set_mail_domain():
+    mail_domain = ""
     if app.config['MAIL_SERVER']:
-        hostname = app.config['MAIL_DOMAIN']
+        mail_domain = app.config['MAIL_DOMAIN']
     else:
-        hostname = None
+        mail_domain = None
+    return mail_domain
     
 
 def email_disp(email):