Handling of SMTPRecipientsRefused exception

[weilu]

Following the docs on "How To Create Users Without Setting Their Password" https://django-authtools.readthedocs.io/en/latest/how-to/invitation-email.html (relevant code snippet below), the call to reset_form.save could trigger SMTPRecipientsRefused if the recipient email address is invalid, currently it will result in a 500 as-is. My understanding is that usually form error validations are handled in the clean_* method, any suggestions on how to deal with the SMTPRecipientsRefused exception in this case?

    def save_model(self, request, obj, form, change):
        if not change and (not form.cleaned_data['password1'] or not obj.has_usable_password()):
            # Django's PasswordResetForm won't let us reset an unusable
            # password. We set it above super() so we don't have to save twice.
            obj.set_password(get_random_string())
            reset_password = True
        else:
            reset_password = False

        super(UserAdmin, self).save_model(request, obj, form, change)

        if reset_password:
            reset_form = PasswordResetForm({'email': obj.email})
            assert reset_form.is_valid()
            reset_form.save(
                request=request,
                use_https=request.is_secure(),
                subject_template_name='registration/account_creation_subject.txt',
                email_template_name='registration/account_creation_email.html',
            )