diff --git a/Classes/Hooks/JumpurlController.php b/Classes/Hooks/JumpurlController.php
index d514c4633..1a86ef297 100644
--- a/Classes/Hooks/JumpurlController.php
+++ b/Classes/Hooks/JumpurlController.php
@@ -155,7 +155,7 @@ public function preprocessRequest($parameter, $parentObject)
                     // set juHash as done for external_url in core: http://forge.typo3.org/issues/46071
                     GeneralUtility::_GETset(GeneralUtility::hmac($jumpurl, 'jumpurl'), 'juHash');
                     $responseType = -1;
-                } elseif (GeneralUtility::isValidUrl($jumpurl)) {
+                } else {
                     // if it's a valid URL, throw exception
                     throw new \Exception('direct_mail: Invalid JumpURL parameter.', 1578347190);
                 }
@@ -178,8 +178,8 @@ public function preprocessRequest($parameter, $parentObject)
                 );
 
                 // check if entry exists in the last 10 seconds
-                $existingLog = $db->exec_SELECTcountRows(
-                    '*',
+                $existingLog = $db->exec_SELECTgetSingleRow(
+                    '1',
                     $logTable,
                     implode(' AND ',
                         array(
@@ -195,7 +195,7 @@ public function preprocessRequest($parameter, $parentObject)
                     )
                 );
 
-                if ($existingLog === 0) {
+                if ($existingLog === false) {
                     $db->exec_INSERTquery($logTable, $insertFields);
                 }
             }