+Connecting to ip4.ip4.ip4.ip4 port 1224 ... connected
+??? 220
+<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+>>> helo passme.helo.example.com
+??? 250
+<<< 250 myhost.test.ex Hello passme.helo.example.com [ip4.ip4.ip4.ip4]
+>>> mail from:<failme@example.com>
+??? 250
+<<< 250 OK
+>>> rcpt to:<fred@test.ex>
+??? 550
+<<< 550 Administrative prohibition
+>>> quit
+End of script