diff --git a/server/plugins-available/mail_plugin.inc.php b/server/plugins-available/mail_plugin.inc.php
index 0437d6aa39249c15c1369bf6a465b8df65bc1fd4..70982a5ee7b9e30047155b59771e5274828e83fe 100644
--- a/server/plugins-available/mail_plugin.inc.php
+++ b/server/plugins-available/mail_plugin.inc.php
@@ -317,7 +317,7 @@ class mail_plugin {
 		$mail_config = $app->getconf->get_server_config($conf['server_id'], 'mail');
 		
 		$old_maildir_path = escapeshellcmd($data['old']['maildir']);
-		if($old_maildir_path != $mail_config['homedir_path'] && strlen($old_maildir_path) > strlen($mail_config['homedir_path']) && !stristr($old_maildir_path,'..') && !stristr($old_maildir_path,'*') && strlen($old_maildir_path) >= 10) {
+		if($old_maildir_path != $mail_config['homedir_path'] && strlen($old_maildir_path) > strlen($mail_config['homedir_path']) && !stristr($old_maildir_path,'//') && !stristr($old_maildir_path,'..') && !stristr($old_maildir_path,'*') && strlen($old_maildir_path) >= 10) {
 			exec('rm -rf '.escapeshellcmd($old_maildir_path));
 			$app->log('Deleted the Maildir: '.$data['old']['maildir'],LOGLEVEL_DEBUG);
 		} else {
@@ -334,7 +334,7 @@ class mail_plugin {
 		
 		//* Delete maildomain path
 		$old_maildomain_path = escapeshellcmd($mail_config['homedir_path'].'/'.$data['old']['domain']);
-		if($old_maildomain_path != $mail_config['homedir_path'] && !stristr($old_maildomain_path,'//') && !stristr($old_maildomain_path,'..') && !stristr($old_maildomain_path,'*') && !stristr($old_maildomain_path,'&') && strlen($old_maildomain_path) >= 10) {
+		if($old_maildomain_path != $mail_config['homedir_path'] && !stristr($old_maildomain_path,'//') && !stristr($old_maildomain_path,'..') && !stristr($old_maildomain_path,'*') && !stristr($old_maildomain_path,'&') && strlen($old_maildomain_path) >= 10  && !empty($data['old']['domain'])) {
 			exec('rm -rf '.escapeshellcmd($old_maildomain_path));
 			$app->log('Deleted the mail domain directory: '.$old_maildomain_path,LOGLEVEL_DEBUG);
 		} else {
@@ -343,7 +343,7 @@ class mail_plugin {
 		
 		//* Delete mailfilter path
 		$old_maildomain_path = escapeshellcmd($mail_config['homedir_path'].'/mailfilters/'.$data['old']['domain']);
-		if($old_maildomain_path != $mail_config['homedir_path'].'/mailfilters/' && !stristr($old_maildomain_path,'//') && !stristr($old_maildomain_path,'..') && !stristr($old_maildomain_path,'*') && !stristr($old_maildomain_path,'&') && strlen($old_maildomain_path) >= 10) {
+		if($old_maildomain_path != $mail_config['homedir_path'].'/mailfilters/' && !stristr($old_maildomain_path,'//') && !stristr($old_maildomain_path,'..') && !stristr($old_maildomain_path,'*') && !stristr($old_maildomain_path,'&') && strlen($old_maildomain_path) >= 10 && !empty($data['old']['domain'])) {
 			exec('rm -rf '.escapeshellcmd($old_maildomain_path));
 			$app->log('Deleted the mail domain mailfilter directory: '.$old_maildomain_path,LOGLEVEL_DEBUG);
 		} else {