diff --git a/interface/lib/classes/tform_actions.inc.php b/interface/lib/classes/tform_actions.inc.php
index e4b366fadd1e273d0c86baf308f75f4c7c9db735..e0ff25145575407e09e062b40f57e462e99c5c2d 100644
--- a/interface/lib/classes/tform_actions.inc.php
+++ b/interface/lib/classes/tform_actions.inc.php
@@ -111,8 +111,9 @@ class tform_actions {
 
 		$ext_where = '';
 		// pre-fill dataRecord array with elements from database to avoid overwriting fields set by admin but hidden for client
-		$tmp_old_record = $app->tform->getDataRecord($this->id);
-		if($tmp_old_record && is_array($tmp_old_record)) $this->dataRecord = array_merge($tmp_old_record, $this->dataRecord);
+		//$tmp_old_record = $app->tform->getDataRecord($this->id);
+		//if($tmp_old_record && is_array($tmp_old_record)) $this->dataRecord = array_merge($tmp_old_record, $this->dataRecord);
+		// disabled due to problems with mail users, see https://git.ispconfig.org/ispconfig/ispconfig3/issues/4513
 		$sql = $app->tform->getSQL($this->dataRecord, $app->tform->getCurrentTab(), 'UPDATE', $this->id, $ext_where);
 		if($app->tform->errorMessage == '') {