diff --git a/capsulflask/__init__.py b/capsulflask/__init__.py
index ab8df11..f85f268 100644
--- a/capsulflask/__init__.py
+++ b/capsulflask/__init__.py
@@ -56,7 +56,7 @@ app.config.from_mapping(
 
   MAIL_SERVER=os.environ.get("MAIL_SERVER", default=""),
   MAIL_PORT=os.environ.get("MAIL_PORT", default="465"),
-  MAIL_USE_TLS=os.environ.get("MAIL_USE_TLS", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
+  MAIL_USE_TLS=os.environ.get("MAIL_USE_TLS", default="False").lower() in ['true', '1', 't', 'y', 'yes'],
   MAIL_USE_SSL=os.environ.get("MAIL_USE_SSL", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
   MAIL_USERNAME=os.environ.get("MAIL_USERNAME", default=""),
   MAIL_PASSWORD=os.environ.get("MAIL_PASSWORD", default=""),