MT-NewsWatcher generates a Date header if you have configured your Mac with your local time zone. It is important that you have the date and time set correctly on your Mac, and that your time zone information is correct, or MT-NewsWatcher's Date header will be wrong. If you haven't configured your Mac with your local time zone, MT-NewsWatcher does not generate a Date header. Most news and mail servers will supply one for you in this case. This is not always true, however.
Some servers require a Date header.
This is particularly common with mail servers in Europe. The message ids are listed in order from oldest to newest. MT-NewsWatcher generates this header for you. You can use this header to specify your preference for courtesy email copies of followups to your postings. The poster of the article always wants to get courtesy email copies of followups.