+****
+#
+# fail on bad -oMm message id
+1
+exim -odi -f jc@rome -F 'Julius Caesar' -oMm 123456-67890-11 -oMt jc44bc userx@test.x
+This is a test message.
+****
+#
+# do not fail on good -oMm message id
+exim -odi -f jc@rome -F 'Julius Caesar' -oMm 10HmaX-0005vi-00 -oMt jc44bc userx@test.x
+This is a test message.
+****