Remove admin/structure/mailer/add menu router
The mailer-add form will never be called directly as an entity-create form. Instead, implementing modules will call mailer_form() to create full-page forms, or by Mailer to create block forms.
The mailer-add form will never be called directly as an entity-create form. Instead, implementing modules will call mailer_form() to create full-page forms, or by Mailer to create block forms.