I found a bug as I think and sure.
- Go to "ACP -> vBulletin Options -> Cyb - Advanced Forum Rules"
- Check in "Permission Settings - Before Accepting Rules User Can Not" the option:
- Save
- No try to load in another browser from anonymous user the page
- You will get a message "You must first accept the Forum Rules to be able to send e-mails!"
The same will be for registered users.
I am quit sure that "Contact Us" must not be influenced with permission of "Send e-mails" option.