declare module 'mailparser' {
  export function simpleParser(source: Buffer | string | Readable, options?: any): Promise<ParsedMail>;
  
  export interface ParsedMail {
    headers: Map<string, any>;
    subject?: string;
    from?: AddressObject;
    to?: AddressObject | AddressObject[];
    cc?: AddressObject | AddressObject[];
    bcc?: AddressObject | AddressObject[];
    date?: Date;
    messageId?: string;
    inReplyTo?: string;
    replyTo?: AddressObject;
    references?: string | string[];
    html?: string | false;
    text?: string;
    textAsHtml?: string;
    attachments: Attachment[];
  }

  export interface AddressObject {
    value: Mailbox[];
    html: string;
    text: string;
  }

  export interface Mailbox {
    name: string;
    address: string;
  }

  export interface Attachment {
    type: string;
    contentType: string;
    partId: string;
    filename?: string;
    contentDisposition?: string;
    checksum: string;
    size: number;
    headers: Map<string, any>;
    content: Buffer;
    cid?: string;
    related?: boolean;
  }
}