diff --git a/phpmailer/phpmailer.php b/phpmailer/phpmailer.php
index 25b94047..84022f24 100644
--- a/phpmailer/phpmailer.php
+++ b/phpmailer/phpmailer.php
@@ -105,6 +105,6 @@ function phpmailer_emailer_send_prepare(App $a, IEmail &$email)
 			$email = null;
 		}
 	} catch (Exception $e) {
-		DI::logger()->error('PHPMailer error', ['email' => $email, 'ErrorInfo' => $mailer->ErrorInfo, 'exception' => $e]);
+		DI::logger()->error('PHPMailer error', ['email' => $email, 'ErrorInfo' => $mailer->ErrorInfo, 'exception' => $e->__toString()]);
 	}
 }
diff --git a/securemail/securemail.php b/securemail/securemail.php
index fb801a4c..3b6f5beb 100644
--- a/securemail/securemail.php
+++ b/securemail/securemail.php
@@ -142,6 +142,6 @@ function securemail_emailer_send_prepare(App &$a, IEmail &$email)
 		$email = $email->withMessage($armored_encrypted, null);
 
 	} catch (Exception $e) {
-		DI::logger()->warning('Encryption failed.', ['email' => $email, 'exception' => $e]);
+		DI::logger()->warning('Encryption failed.', ['email' => $email, 'exception' => $e->__toString()]);
 	}
 }