diff --git a/emails/backend/smtp/client.py b/emails/backend/smtp/client.py
index f6d41e4..a15ee62 100644
--- a/emails/backend/smtp/client.py
+++ b/emails/backend/smtp/client.py
@@ -25,7 +25,11 @@ def __init__(self, parent, **kwargs):
 
         SMTP.__init__(self, **kwargs)
 
-        self.initialize()
+        try:
+            self.initialize()
+        except smtplib.SMTPAuthenticationError:
+            self.quit()
+            raise
 
 
     def initialize(self):