**** SMTP testing session as if from host 1.1.1.1
**** but without any ident (RFC 1413) callback.
**** This is not for real!

220 the.local.host.name ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
250 <userx@test.ex> is deliverable
550 <junkjunk@test.ex> Unrouteable address
451 Cannot resolve <expan@test.ex> at this time
221 the.local.host.name closing connection