diff --git a/core/admin/mailu/internal/nginx.py b/core/admin/mailu/internal/nginx.py
index 3638645b..daef8b9e 100644
--- a/core/admin/mailu/internal/nginx.py
+++ b/core/admin/mailu/internal/nginx.py
@@ -98,7 +98,7 @@ def handle_authentication(headers):
             password = urllib.parse.unquote(headers["Auth-Pass"])
             ip = urllib.parse.unquote(headers["Client-Ip"])
         except:
-            app.logger.warn(f'Received undecodable user/password from nginx: {headers.get("Auth-User", "")!r}')
+            app.logger.warn(f'Received undecodable user/password from front: {headers.get("Auth-User", "")!r}')
         else:
             try:
                 user = models.User.query.get(user_email) if '@' in user_email else None