EHLO myhost.test.ex
250-OK
250 HELP
-MAIL FROM:<CALLER@myhost.test.ex>
+MAIL FROM:<>
250 Sender OK
RCPT TO:<userx@domain.com>
250 Recipient OK
.
250 OK
-MAIL FROM:<CALLER@myhost.test.ex>
+MAIL FROM:<>
250 Sender OK
RCPT TO:<abcd@domain.com>
250 Recipient OK
QUIT
250 OK
End of script
+Listening on port 1224 ...
+Connection request from [127.0.0.1]
+220 ESMTP
+EHLO myhost.test.ex
+250-OK
+250 HELP
+MAIL FROM:<>
+450 not right now, sorry
+QUIT
+250 OK
+End of script
+Listening on port 1224 ...
+Connection request from [127.0.0.1]
+220 ESMTP
+EHLO myhost.test.ex
+250-OK
+250 HELP
+MAIL FROM:<>
+250 Sender OK
+RCPT TO:<userz@domain.com>
+550 Recipient refused
+QUIT
+250 OK
+End of script