export function _resolveMx(email: string, opts?: ResolveOptions | null): Promise<Array<{
    priority: number;
    exchange: string;
}>>;
export function resolveEmail(domain: string, opts?: ResolveOptions | null): Promise<ResolveResult>;
export type ResolveResult = {
    emailResolves: boolean;
    mxRecords?: Array<{
        priority: number;
        exchange: string;
    }>;
    error?: Error;
};
export type ResolveOptions = {
    allowIps?: boolean;
    allowDisposable?: boolean;
};
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