diff --git a/server/lib/classes/cron.d/500-backup.inc.php b/server/lib/classes/cron.d/500-backup.inc.php
index 68c5920579d0d323ab8719f2accac5876b6202f7..81f80643665369c2f510f702bb9202523ddfb087 100644
--- a/server/lib/classes/cron.d/500-backup.inc.php
+++ b/server/lib/classes/cron.d/500-backup.inc.php
@@ -314,6 +314,8 @@ class cronjob_backup extends cronjob {
 						}
 					}
 				}
+				//* end run_backups
+				if( $server_config['backup_dir_is_mount'] == 'y' ) $app->system->umount_backup_dir($backup_dir);
 			} else {
 				//* send email to admin that backup directory could not be mounted
 				$global_config = $app->getconf->get_global_config('mail');
diff --git a/server/lib/classes/cron.d/500-backup_mail.inc.php b/server/lib/classes/cron.d/500-backup_mail.inc.php
index a13974af6254f9319629c9f950eced9784ed6256..81e39ed0cc36b1bad4ed366c328e575565ff0965 100644
--- a/server/lib/classes/cron.d/500-backup_mail.inc.php
+++ b/server/lib/classes/cron.d/500-backup_mail.inc.php
@@ -181,7 +181,8 @@ class cronjob_backup_mail extends cronjob {
 						}
 					}
 				}
-			}
+				if( $server_config['backup_dir_is_mount'] == 'y' ) $app->system->umount_backup_dir($backup_dir);
+			} //* end run_backups
 		}
 
 		parent::onRunJob();
diff --git a/server/lib/classes/system.inc.php b/server/lib/classes/system.inc.php
index 75dc73deb95e4ba18b60da2a771099ee5f1481eb..98fc51fdef84cf4a018eb9a927224ad525608c6e 100644
--- a/server/lib/classes/system.inc.php
+++ b/server/lib/classes/system.inc.php
@@ -1808,7 +1808,7 @@ class system{
 				fileowner($mount_cmd) === 0
 		) {
 			if (!$this->is_mounted($backup_dir)){
-				exec($backup_dir_mount_cmd);
+				exec($mount_cmd);
 				sleep(1);
 				if (!$this->is_mounted($backup_dir)) $mounted = false;
 			}
@@ -1816,7 +1816,21 @@ class system{
 
 		return $mounted;
 	}
-				
+
+	function umount_backup_dir($backup_dir, $mount_cmd = '/usr/local/ispconfig/server/scripts/backup_dir_umount.sh'){
+		if ( 	is_file($mount_cmd) &&
+				is_executable($mount_cmd) &&
+				fileowner($mount_cmd) === 0
+		) {
+			if ($this->is_mounted($backup_dir)){
+				exec($mount_cmd);
+				sleep(1);
+			}
+		}
+
+        return $this->is_mounted($backup_dir) == 0 ? true : false;
+	}
+
 	function getinitcommand($servicename, $action, $init_script_directory = ''){
 		global $conf;
 		// upstart
diff --git a/server/plugins-available/mail_plugin_dkim.inc.php b/server/plugins-available/mail_plugin_dkim.inc.php
index 9fb927ee7e3e695038569aa5124b08f7beaaba56..7fea83c8a6c002e25d9446699f7d7f77d997c01d 100755
--- a/server/plugins-available/mail_plugin_dkim.inc.php
+++ b/server/plugins-available/mail_plugin_dkim.inc.php
@@ -405,7 +405,7 @@ class mail_plugin_dkim {
 			}
 
 			/* resync */
-			if ($data['new']['active'] == 'y' && $data['new'] == $data['old']) {
+			if ($data['new']['active'] == 'y' && $data['new'] == $data['old'] && $data['new']['dkim']=='y') {
 				$this->add_dkim($data);
 			}
 		}