diff --git a/interface/web/mail/mail_domain_dkim_create.php b/interface/web/mail/mail_domain_dkim_create.php
index 2a486a7db71e588540ecca686d2d6c83acbdf086..0f636b12db63306c504abd822bf56ff482aefec4 100644
--- a/interface/web/mail/mail_domain_dkim_create.php
+++ b/interface/web/mail/mail_domain_dkim_create.php
@@ -80,7 +80,7 @@ function get_public_key($private_key) {
 	require_once('../../lib/classes/validate_dkim.inc.php');
 	$validate_dkim=new validate_dkim ();
 	if($validate_dkim->validate_post('private',$private_key)) { /* validate the $_POST-value */
-		exec('echo '.escapeshellarg($private_key).'|openssl rsa -pubout -outform PEM',$pubkey,$result);
+		exec('echo '.escapeshellarg($private_key).'|openssl rsa -pubout -outform PEM 2> /dev/null',$pubkey,$result);
 		$public_key=pub_key($pubkey);
 	} else {
 		$public_key='invalid key';
@@ -92,8 +92,8 @@ $_POST=getRealPOST();
 
 switch ($_POST['action']) {
 	case 'create': /* create DKIM Private-key */
-		exec('openssl rand -out /usr/local/ispconfig/server/temp/random-data.bin 4096', $output, $result);
-		exec('openssl genrsa -rand /usr/local/ispconfig/server/temp/random-data.bin 1024', $privkey, $result);
+		exec('openssl rand -out /usr/local/ispconfig/server/temp/random-data.bin 4096 2> /dev/null', $output, $result);
+		exec('openssl genrsa -rand /usr/local/ispconfig/server/temp/random-data.bin 1024 2> /dev/null', $privkey, $result);
 		unlink("/usr/local/ispconfig/server/temp/random-data.bin");
 		foreach($privkey as $values) $private_key=$private_key.$values."\n";
 	break;
diff --git a/server/plugins-available/mail_plugin_dkim.inc.php b/server/plugins-available/mail_plugin_dkim.inc.php
index e07dfe8af0115eac39ef0fcda80b9671881e1342..0767427d13a2f7b88d660ae1cd522ef8faf497a8 100644
--- a/server/plugins-available/mail_plugin_dkim.inc.php
+++ b/server/plugins-available/mail_plugin_dkim.inc.php
@@ -181,7 +181,7 @@ class mail_plugin_dkim {
 			$app->log('Saved DKIM Private-key to '.$key_file.'.private', LOGLEVEL_DEBUG);
 			$success=true;
 			/* now we get the DKIM Public-key */
-			exec('cat '.escapeshellarg($key_file.'.private').'|openssl rsa -pubout', $pubkey, $result);
+			exec('cat '.escapeshellarg($key_file.'.private').'|openssl rsa -pubout 2> /dev/null', $pubkey, $result);
 			$public_key='';
 			foreach($pubkey as $values) $public_key=$public_key.$values."\n";
 			/* save the DKIM Public-key in dkim-dir */