docs: config.yml.example - remove smtp section, ns8-sendmail handles delivery

config/config.yml.example

@@ -1,38 +1,13 @@
 # ns8-backup-monitor configuration
 
-# ---------------------------------------------------------------------------
-# SMTP settings
-# ---------------------------------------------------------------------------
-# By default (use_ns8_relay: true), ns8-backup-monitor automatically reads
-# the SMTP relay configured in NethServer 8 from the cluster Redis state
-# (key: cluster/mail_settings). This is the same relay used by NS8 itself
-# for system notifications, so no manual SMTP setup is needed in most cases.
-#
-# The fallback chain is:
-#   1. NS8 Redis (cluster/mail_settings)  <-- default, preferred
-#   2. smtp section below
-#   3. localhost:25 unauthenticated
-#
-# To disable auto-detection and use the settings below, set:
-#   use_ns8_relay: false
-smtp:
-  use_ns8_relay: true   # set to false to force manual SMTP config below
-
-  # Manual SMTP config (used only if use_ns8_relay: false or NS8 relay not found)
-  host: localhost
-  port: 587
-  use_tls: false
-  use_starttls: true
-  username: ""
-  password: ""
-
 # ---------------------------------------------------------------------------
 # Notification recipients
 # ---------------------------------------------------------------------------
+# Email delivery is handled by ns8-sendmail, which uses the SMTP relay
+# already configured in NethServer 8. No SMTP settings needed here.
 mail:
-  # Sender address.
-  # If use_ns8_relay: true, the 'from' is read from NS8 Redis (mail_from field).
-  # You can override it here if needed.
+  # Sender address (optional - ns8-sendmail may override this with the
+  # system sender; useful to set for clarity in mail clients)
   from: "ns8-backup-monitor@yourdomain.com"
 
   # List of recipients - REQUIRED, always set this