Were currently use Jira for a handful of projects, and only one of those (the Support Helpdesk) is external facing.
The rest are internal, and shouldn't have any contact with the outside world.
At the moment we have Self-Signup disabled, with the below logs when a non-registered email address sends an email:
"Sorry, self-signup is disabled for this help center. You need to be invited first."
I have been told this is because it would allow the outside world to register themselves to our internal project, if they happened to get their hands on the project URL, or the project email.
So back to the question, is there a way to turn on Self-Signup per Project (not site-wide)?