/**
 * Fields of a `mailto:` link (RFC 6068). Address lists hold bare addresses
 * such as `name@example.com`.
 */
export interface MailtoFields {
    to: string[];
    cc: string[];
    bcc: string[];
    subject: string;
    body: string;
    /** Other header fields, kept as they are when a link is edited */
    headers: Array<[string, string]>;
}
/**
 * Splits a user-typed list of addresses separated by commas, semicolons or spaces
 */
export declare function splitAddresses(value: string): string[];
/**
 * Returns the addresses of the list that do not look like `name@domain.tld`
 */
export declare function invalidAddresses(addresses: string[]): string[];
/**
 * Builds the `href` of a `mailto:` link. Line breaks in the body are sent as CRLF, as the RFC requires.
 */
export declare function buildMailto(fields: MailtoFields): string;
/**
 * Parses the `href` of a `mailto:` link. Returns null for other links.
 * Repeated `to`, `cc` and `bcc` fields are merged, `+` is kept as a plus sign.
 */
export declare function parseMailto(href: string): MailtoFields | null;