/**
 * Disposable / temporary email domain detection.
 *
 * Curated list of the most common disposable-email providers. Deliberately
 * small: music PR contact lists rarely contain disposable addresses, so we
 * optimise for the obvious offenders rather than completeness. Pure data +
 * pure function -- no Node APIs -- so this module is browser-safe.
 */
/** True when the domain is a known disposable-email provider. */
export declare function isDisposableDomain(domain: string): boolean;