+acl_smtp_rcpt = accept
+log_selector = +received_recipients +millisec
+
+.ifdef OPT
+bounce_message_file = OPT
+warn_message_file = OPT
+.endif
+
+delay_warning = 1s
+
+# ----- Routers -----
+
+begin routers
+
+delay:
+ driver = redirect
+ local_parts = ^delay
+ allow_defer
+ data = :defer: deliberate for test purposes
+
+bounces:
+ driver = accept
+ condition = ${if !def:sender_address}
+ transport = savebounce
+
+begin transports
+
+savebounce:
+ driver = appendfile
+ file = DIR/test-mail/bounce_message
+ user = CALLER