diff --git a/libs/mlmmj.py b/libs/mlmmj.py
index 42e7f97..6e484e0 100644
--- a/libs/mlmmj.py
+++ b/libs/mlmmj.py
@@ -786,9 +786,9 @@ def has_subscriber(mail, subscriber, subscription=None):

         if os.path.exists(_sub_file):
             with open(_sub_file, 'r') as f:
-                line = f.readline().strip()
-                if line == subscriber:
-                    return (True, subscription)
+                for line in f:
+                    if line.strip() == subscriber:
+                        return (True, subscription)

     return False