We are having problems where members are getting the "Banned", "You do not have permission to view this site" message.  We've deleted them and recreated but they still get the banned message.  In looking around the help guides and community forum it seems that the cause of banned relates to Spam Prevention.  However, in looking at our configuration, we do not have "Ban member" enabled.  So, my question is what else could be causing members to get banned?  I've cleared all of the items from the Ban Settings list to get these members back but I'd like to understand how to prevent this moving forward.  Thank you.

Is it affecting new registrations or members who have been already registered? What was the last change/modification done to the forum prior to this happening?

Probably their IP addresses are banned. Check you Spam Prevention configuration.

We would need an example user if you would like for us to take a look and advise