// https://www.rfc-editor.org/rfc/rfc7208#section-7.1
export function validateSpfDomain(domain) {
	return domain
		.split(".")
		.every(segment => segment.match(/^([^%]|%_|%%|%-|%\{[slodiphcrtv]\d*r?[-.+,\/_=]*})+$/));
}