Show SITE_NAME as the email From display name.

Bare DEFAULT_FROM_EMAIL addresses were rendering as "noreply" in inboxes; wrap them as "Monica Dhillon" <address>.

.env.prod.example

@@ -24,6 +24,9 @@ SITE_UNDER_CONSTRUCTION=true
 SITE_NAME=Monica Dhillon
 SITE_TAGLINE=MKDRealtor.com · EXIT Realty Redefined
 PUBLIC_SITE_URL=https://mkdrealtor.com
+# Inbox From (display name auto-added from SITE_NAME if omitted).
+# SMTP2GO must allow sending as this address. Example:
+# DEFAULT_FROM_EMAIL="Monica Dhillon" <notifications-beta@mkdrealtor.com>
 DEFAULT_FROM_EMAIL=noreply@mkdrealtor.com
 CONTACT_PHONE=
 CONTACT_EMAIL=
@@ -41,7 +44,7 @@ WEB_PORT=8004
 RECAPTCHA_PUBLIC_KEY=replace-me
 RECAPTCHA_PRIVATE_KEY=replace-me
 
-# SMTP2GO email
+# SMTP2GO email — HOST_USER is SMTP auth only; From uses DEFAULT_FROM_EMAIL
 EMAIL_HOST=mail.smtp2go.com
 EMAIL_HOST_USER=replace-me
 EMAIL_HOST_PASSWORD=replace-me