--- /dev/null
+220 mail.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000\r
+250 OK\r
+451 Temporary local problem - please try later\r
+451 Temporary local problem - please try later\r
+221 mail.test.ex closing connection\r
+220 mail.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000\r
+250 OK\r
+451-host lookup did not complete\r
+451 Could not complete sender verify\r
+451-host lookup did not complete\r
+451 Could not complete sender verify\r
+221 mail.test.ex closing connection\r