interface OtpParams {
    accountId: string;
    mailbox?: string;
    sender: string;
    subjectPattern?: string;
    timeout?: number;
}
export declare function emailOtpExtract(params: OtpParams): Promise<{
    success: boolean;
    code?: string;
    message: string;
    from?: string;
    subject?: string;
}>;
export {};
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