I used to get emails when a message came in, but don't any longer.
Click "user control panel" in a light blue bar at the top of every page. Then click the "board preferences" tab. See if "Notify me on new private messages" is marked "yes." If not, click the circle.
If "yes" was checked, then click the "profile" tab and make sure the email address listed is your current one.
If "yes" was checked and your email address is current, maybe the messages are being nabbed as spam. Whitelist messages from @caves.org (I think address is
forums@caves.org, but someone correct me if I'm wrong) so they slip through spam filters. Then have someone send you a PM and see if you receive a notice (in either your in box or spam/junk box).
Cheryl