--- a/amavisd-snmp-subagent
+++ b/amavisd-snmp-subagent
@@ -780,7 +780,7 @@
   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>/dev/null);
     if (!defined $mta_queue_dir) {
       if ($! != 0) {
         do_log(1, "no postfix (unable to run postconf command): $!");
--- a/amavisd-snmp-subagent-zmq
+++ b/amavisd-snmp-subagent-zmq
@@ -1123,7 +1123,7 @@
   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>/dev/null);
     if (!defined $mta_queue_dir) {
       if ($! != 0) {
         do_log(1, "no postfix (unable to run postconf command): $!");
