fix: load SMTP via secret files on submissions:465

Env-based notifier creds were unreliable; use secrets/smtp_*.txt, RFC5322 sender, and implicit TLS to 0012.de Plesk.

Co-authored-by: Cursor <cursoragent@cursor.com>

config/configuration.yml

@@ -1,6 +1,6 @@
 ---
 # Authelia configuration — secrets via template files under /secrets/
-# SMTP username/password/sender come from environment (see compose.yml / .env)
+# SMTP username/password/sender: files in /secrets/smtp_*.txt (see README)
 
 server:
   address: 'tcp://:9091'
@@ -73,10 +73,14 @@ storage:
 notifier:
   disable_startup_check: false
   smtp:
-    address: 'submission://ha01s019.org-dns.com:587'
-    timeout: '10s'
+    address: 'submissions://ha01s019.org-dns.com:465'
+    timeout: '15s'
+    username: {{ secret "/secrets/smtp_username.txt" | mindent 0 "|" | msquote }}
+    password: {{ secret "/secrets/smtp_password.txt" | mindent 0 "|" | msquote }}
+    sender: {{ secret "/secrets/smtp_sender.txt" | mindent 0 "|" | msquote }}
+    identifier: 'auth.schwenk.online'
     subject: '[Authelia] {title}'
     startup_check_address: 'cuidas@gmail.com'
     disable_require_tls: false
     disable_starttls: false
-    # username, password, sender: AUTHELIA_NOTIFIER_SMTP_* from environment
+    disable_html_emails: false