--- /dev/null
+# test config 4050
+# Pipelining the early part of the SMTP conversation
+
+CONNECTCOND=
+CONTROL=
+RETRY=7d
+
+keep_environment = PATH
+exim_path = EXIM_PATH
+host_lookup_order = bydns
+spool_directory = DIR/spool
+
+.ifdef SERVER
+log_file_path = DIR/spool/log/SERVER%slog
+.else
+log_file_path = DIR/spool/log/%slog
+.endif
+
+gecos_pattern = ""
+gecos_name = CALLER_NAME
+dns_cname_loops = 9
+chunking_advertise_hosts =
+tls_advertise_hosts =
+
+pipelining_connect_advertise_hosts = CONNECTCOND
+retry_data_expire = RETRY
+log_selector = +received_recipients +pipelining
+queue_only
+
+acl_smtp_rcpt = accept
+
+#
+begin routers
+
+server:
+ driver = redirect
+ condition = ${if eq {SERVER}{server}}
+ data = :blackhole:
+
+clientbounce:
+ driver = redirect
+ condition = ${if !def:sender_address}
+ data = :blackhole:
+
+client:
+ driver = manualroute
+ route_data = 127.0.0.1::PORT_D
+ self = send
+ transport = smtp
+
+#
+begin transports
+
+smtp:
+ driver = smtp
+ hosts_pipe_connect = CONTROL
+ max_rcpt = 1
+
+#
+begin retry
+
+* * F,5d,1d
+