diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/ServiceActions.php b/snappymail/v/0.0.0/app/libraries/RainLoop/ServiceActions.php
index 205d9f703..8510bb3bd 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/ServiceActions.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/ServiceActions.php
@@ -98,13 +98,15 @@ public function ServiceJson() : string
 				$token = Utils::GetCsrfToken();
 				if (isset($_SERVER['HTTP_X_SM_TOKEN'])) {
 					if ($_SERVER['HTTP_X_SM_TOKEN'] !== $token) {
-						$sEmail = $this->oActions->getAccountFromToken(false)->Email();
+						$oAccount = $this->oActions->getAccountFromToken(false);
+						$sEmail = $oAccount ? $oAccount->Email() : 'guest';
 						$this->oActions->logWrite("{$_SERVER['HTTP_X_SM_TOKEN']} !== {$token} for {$sEmail}", \LOG_ERROR, 'Token');
 						throw new Exceptions\ClientException(Notifications::InvalidToken, null, 'HTTP Token mismatch');
 					}
 				} else if ($this->oHttp->IsPost()) {
 					if (empty($_POST['XToken']) || $_POST['XToken'] !== $token) {
-						$sEmail = $this->oActions->getAccountFromToken(false)->Email();
+						$oAccount = $this->oActions->getAccountFromToken(false);
+						$sEmail = $oAccount ? $oAccount->Email() : 'guest';
 						$this->oActions->logWrite("{$_POST['XToken']} !== {$token} for {$sEmail}", \LOG_ERROR, 'XToken');
 						throw new Exceptions\ClientException(Notifications::InvalidToken, null, 'XToken mismatch');
 					}