--- amavisd-snmp-subagent-zmq.orig	Fri Jul 11 10:03:13 2014
+++ amavisd-snmp-subagent-zmq	Fri Jul 11 10:10:01 2014
@@ -1123,7 +1123,7 @@ my $keep_running = 1;
   if (!defined $mta_queue_dir) {  # test for access to Postfix queue directory
     local($ENV{PATH}) = '/usr/sbin:/usr/local/sbin:/opt/postfix/sbin';
     $! = 0;
-    $mta_queue_dir = qx(postconf -h queue_directory);
+    $mta_queue_dir = qx(postconf -h queue_directory 2>&1);
     if (!defined $mta_queue_dir) {
       if ($! != 0) {
         do_log(1, "no postfix (unable to run postconf command): $!");