diff --git a/stack.production.yml b/stack.production.yml
index a6f322d..170a8a7 100644
--- a/stack.production.yml
+++ b/stack.production.yml
@@ -10,6 +10,7 @@ x-environment:
   ## docker exec -ti glitch_worker.1.8b8pbbq7kv988mn8advt4n3mh ./manage.py shell_plus
   ## https://docs.djangoproject.com/en/5.0/topics/email/#obtaining-an-instance-of-an-email-backend
   ## from django.core.mail import send_mail; send_mail('Subject here', 'Here is the message.', 'glitch@nixc.us', ['colin@nixc.us'], fail_silently=False)
+  ## https://django-environ.readthedocs.io/en/latest/types.html#environ-env-email-url smtp+tls:// vs smtp+ssl://
   EMAIL_URL: smtp+tls://glitch@nixc.us:G2BeHLDezu2Eg8x5aDy8MZ3RTLJoP6xJyvwDnFDMCrFxe7AWW5mAst96zvkcDq3R@box.p.nixc.us:587 # https://glitchtip.com/documentation/install#configuration
   GLITCHTIP_DOMAIN: https://glitch.nixc.us # Change this to your domain
   DEFAULT_FROM_EMAIL: glitch@nixc.us # Change this to your email