Prevent email address changes

[bbi]

We have a board the prevents registration unless that have a certain email address extention. Does anyone know how to prevent a user from changing there email address once they have registered.
Thanks,
BBI

[Lynne]

You could edit the modifypassword template and remove the code to edit your email. Or, you could probably just write plugin to set $show['edit_email_field'] to false if you want to go the plugin route.