export declare const MAX_RENDERED_CAMPAIGN_CHARACTERS = 2000000;
/** Native Listmonk routes and credential-bearing links are inspected, never visited. */
export declare function isCampaignControlLink(url: URL): boolean;
/** Inspect the server-rendered sample, without fetching links or executing HTML. */
export declare function inspectRenderedCampaignContent(rendered: string, contentType?: string): {
    hasUnsubscribeLink: boolean;
    linksToCheck: string[];
    skippedControlLinks: number;
};