Connecting to 127.0.0.1 port 1225 ... connected
??? 220
<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
>>> expn postmaster
??? 250-
<<< 250-<a@myhost.test.ex>
??? 250-
<<< 250-<b@myhost.test.ex>
??? 250
<<< 250 <c@myhost.test.ex>
>>> expn rhubarb
??? 553
<<< 553 custard@myhost.test.ex is undeliverable
>>> quit
??? 221
<<< 221 myhost.test.ex closing connection
End of script