diff --git a/control.py b/control.py
index 22eab07..ae06f67 100644
--- a/control.py
+++ b/control.py
@@ -99,7 +99,7 @@ class QueueControl(object):
         :param str operation: Known operation from :attr:`pymailq.CONFIG`.
         :param list messages: List of :class:`~store.Mail` objects targetted
                               for operation.
-        :return: Command's *stderr* output lines
+        :return: Command's *stderr* output lines, return code of binary
         :rtype: :func:`list`
         """
         # validate that object's attribute "qid" exist. Raise AttributeError.
@@ -135,7 +135,7 @@ class QueueControl(object):
             except BrokenPipeError:
                 raise RuntimeError("Unexpected error: child process has crashed")
             
-            return [line.strip() for line in stderr.decode().split('\n')]
+            return [line.strip() for line in stderr.decode().split('\n')], child.returncode
              
         # smtpctl do not use stdin, have to call the binary for each message :-(
         else:
@@ -153,11 +153,11 @@ class QueueControl(object):
                 
                 stdout, stderr = child.communicate()
                 if not len(stdout):
-                    return [line.strip() for line in stderr.decode().split('\n')]
+                    return [line.strip() for line in stderr.decode().split('\n')], child.returncode
                 
                 result.append(stdout.decode())
                 
-            return result
+            return result, child.returncode, child.returncode
 
 
     def delete_messages(self, messages):