I'm having an issue, and would appreciate some help. My Moodle site (2.9.1) has Email-based self-registration. The students are various school teachers from ~50 US school districts. Each school district has a unique domain, meaning I have ~50 email suffixes that will be allowed. Due to competitors, we wanted to lock down the site in this way but also open enough that teachers could access it themselves without having us to register them manually.
My problem is that when a user registers with a banned email, an error message displays along with a list of all acceptable email domains. As you can see, the error message is quite long and displays every different domain.
The error message alone is fine or if I can customize to something like "This email is not one of those that are allowed. Please try again with your school work email". How do I do this?