From b4a7d4ca90a04c99ad2d87c939114459fe537028 Mon Sep 17 00:00:00 2001
From: Till Brehm <tbrehm@ispconfig.org>
Date: Wed, 27 Jul 2016 17:15:12 +0200
Subject: [PATCH] Avoid postconf -M errors on old postfix versions.

---
 install/lib/installer_base.lib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 45a968e734..de46f56979 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -812,7 +812,7 @@ class installer_base {
 	public function get_postfix_service($service, $type) {
 		global $conf;
 
-		exec("postconf -M", $out, $ret);
+		exec("postconf -M 2> /dev/null", $out, $ret);
 
 		if ($ret === 0) { //* with postfix >= 2.9 we can detect configured services with postconf
 			unset($out);
-- 
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