diff --git a/src/application/tools/emailNotifications.js b/src/application/tools/emailNotifications.js
index d3ddb755..138461b8 100644
--- a/src/application/tools/emailNotifications.js
+++ b/src/application/tools/emailNotifications.js
@@ -58,7 +58,10 @@ async function sendEmailNotification(notificationInfo, errors, debug = false) {
   }
 
   // Ensure that the tlsRejectUnauthorized property is a boolean
-  if (notificationInfo.tlsRejectUnauthorized && (notificationInfo.tlsRejectUnauthorized !== true || notificationInfo.tlsRejectUnauthorized !== false)) {
+  if (
+    notificationInfo.tlsRejectUnauthorized
+    && typeof notificationInfo.tlsRejectUnauthorized !== 'boolean'
+  ) {
     logger.warn('The notificationInfo.tlsRejectUnauthorized should be a boolean value. The value provided will not be used.');
   }