diff -r ff2a61e155db -r 33a45e4c80c4 VirtualMailManager/ext/postconf.py
--- a/VirtualMailManager/ext/postconf.py	Sat Mar 05 22:46:17 2011 +0000
+++ b/VirtualMailManager/ext/postconf.py	Thu Mar 10 19:34:28 2011 +0000
@@ -50,8 +50,8 @@
           the parameter's new value.
         """
         self._check_parameter(parameter)
-        stdout, stderr = Popen((self._bin, '-e', parameter + '=' + str(value)),
-                               stderr=PIPE).communicate()
+        stderr = Popen((self._bin, '-e', parameter + '=' + str(value)),
+                       stderr=PIPE).communicate()[1]
         if stderr:
             raise VMMError(stderr.strip(), VMM_ERROR)