diff --git a/src/ezgmail/__init__.py b/src/ezgmail/__init__.py
index cc0cd7c..84b6654 100644
--- a/src/ezgmail/__init__.py
+++ b/src/ezgmail/__init__.py
@@ -428,7 +428,7 @@ def replyAll(self, body, attachments=None, cc=None, bcc=None, mimeSubtype="plain
 
         # NOTE: Since the ``sender`` argument is ignored by Gmail anyway, I'm not including in this method the
         # way it is included in ``send()``.
-        pass
+        raise NotImplementedError
         # TODO - I need to remove EMAIL_ADDRESS from the first argument here:
         #send(self.sender + ', ' + self.recipient, self.subject, body, attachments=attachments, cc=cc, bcc=bcc, mimeSubtype=mimeSubtype, _threadId=self.threadId)