email disposable domains

rowers/forms.py

@@ -1000,6 +1000,8 @@ class RegistrationFormTermsOfService(RegistrationForm):
                              error_messages={'required': "You must agree to the terms to register"})
 
 
+DISPOSABLE_DOMAINS = ["powerscrews.com"]
+    
 class RegistrationFormUniqueEmail(RegistrationFormTermsOfService):
     """
     Subclass of ``RegistrationFormTermsOfService`` which enforces uniqueness of
@@ -1011,6 +1013,12 @@ class RegistrationFormUniqueEmail(RegistrationFormTermsOfService):
         Validate that the supplied email address is unique for the
         site.
         """
+        
+        email = self.cleaned_data['email']
+        domain = email.split('@')[-1].lower()
+        if domain in DISPOSABLE_DOMAINS:
+                raise ValidationError("Registration using this domain is not allowed")
+        
         if User.objects.filter(email__iexact=self.cleaned_data['email']):  # pragma: no cover
             raise forms.ValidationError(
                 "This email address is already in use. Please supply a different email address.")