+250 OK
+MAIL FROM:
+250 Sender OK
+RCPT TO:
+250 Recipient OK
+QUIT
+250 OK
+****
+exim -bs -odf
+EHLO myhost.test.ex
+MAIL FROM:<CALLER@myhost.test.ex>
+RCPT TO:<dest@domain.com>
+QUIT
+****
+#
+# Send message with cutthrough
+#
+server PORT_S
+220 ESMTP
+EHLO
+250 OK
+MAIL FROM: