[TASK] Fixing field for datefilter

Classes/Domain/Repository/MailRepository.php

@@ -142,14 +142,13 @@ class MailRepository extends AbstractRepository {
 		$constraintsAnd[] = $query->logicalOr($constraintsOr);
 
 		$fromTime = strtotime($filters['filterFromDate']);
-
 		if ($fromTime) {
-			$constraintsAnd[] = $query->greaterThan('tstamp', $fromTime);
+			$constraintsAnd[] = $query->greaterThan('last_sending_time', $fromTime);
 		}
 
 		$toTime = strtotime($filters['filterToDate']);
 		if ($toTime) {
-			$constraintsAnd[] = $query->lessThan('tstamp', $toTime);
+			$constraintsAnd[] = $query->lessThan('last_sending_time', $toTime);
 		}
 
 		if ($filters['sent']) {