feat: complete production backend integration

scripts/exim/global_autoresponder_router.conf

@@ -1,2 +1,11 @@
-# global-autoresponder router placeholder
-# This file must only be installed through DirectAdmin/CustomBuild-safe Exim customization paths.
+# BEGIN global-autoresponder router
+# Runs an unseen delivery to the plugin worker for local recipients. Normal mailbox
+# delivery continues because unseen is enabled and the worker suppresses ineligible mail.
+global_autoresponder_router:
+  driver = accept
+  domains = +local_domains
+  condition = ${if exists{/usr/local/directadmin/plugins/global-autoresponder/scripts/global_autoresponder_worker.php}{yes}{no}}
+  transport = global_autoresponder_transport
+  unseen
+  no_verify
+# END global-autoresponder router

scripts/exim/global_autoresponder_transport.conf

@@ -1,2 +1,13 @@
-# global-autoresponder transport placeholder
-# This file must only be installed through DirectAdmin/CustomBuild-safe Exim customization paths.
+# BEGIN global-autoresponder transport
+# The worker receives the original message on stdin and Exim-provided envelope
+# variables such as SENDER, RECIPIENT, LOCAL_PART, and DOMAIN in the environment.
+global_autoresponder_transport:
+  driver = pipe
+  command = /usr/local/directadmin/plugins/global-autoresponder/scripts/global_autoresponder_worker.php
+  user = root
+  group = root
+  return_fail_output = false
+  log_output = true
+  message_prefix =
+  message_suffix =
+# END global-autoresponder transport