One way to give the server access while not giving everyone access is to make the edited files owned by the group under which the server is running, and give the group write access. This requires that you ask your sysadm to make your voh user also a member of that group so that you may actually chgrp files to this group. Your system is using the NCSA HTTPd web server running as user nobody and group nogroup. This file should have one line per class. If it fails to do this you will not be able to submit questions.
Directions are in the file itself.
If your mailer doesn't allow these, you may have to modify the notice in the mail to indicate to the professors that they cannot simply reply to the message. Give it a try, it will make better sense. After you've edited the files in the cgi-bin directory you will need to copy them into the script directory of your web server. In some installations you will need to have your system administrator do this for you. Otherwise attempts to answer questions will fail.