Вы можете использовать Laravel После проверки , например:
$validator = Validator::make(...);
$validator->after(function ($validator) {
$emailValidator = new EmailValidator();
$multipleValidations = new MultipleValidationWithAnd([
new RFCValidation(),
new DNSCheckValidation()
]);
if ($emailValidator->isValid("example@example.com", $multipleValidations)) {
$validator->errors()->add('field', 'Something is wrong with this field!');
}
});