+>>> mail from:<b@test.example.com>
+??? 250
+<<< 250 OK
+>>> rcpt to:<fred@test.ex>
+??? 250
+<<< 250 Accepted
+>>> quit
+End of script
+Connecting to 127.0.0.1 port 1224 ... connected
+??? 220
+<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+>>> helo testclient
+??? 250
+<<< 250 myhost.test.ex Hello testclient [127.0.0.1]
+>>> mail from:<c@example.com>