--- /dev/null
+
+******** SERVER ********
+Listening on port 1224 ...
+Connection request from [127.0.0.1]
+220 Server ready
+EHLO myhost.test.ex
+250 OK
+MAIL FROM:<CALLER@myhost.test.ex>
+250 OK
+RCPT TO:<x@y>
+451 Temporary error
+QUIT
+250 OK
+End of script