meteor/packages/email/email.d.ts

export namespace Email {
  interface EmailOptions {
    from?: string | undefined;
    to?: string | string[] | undefined;
    cc?: string | string[] | undefined;
    bcc?: string | string[] | undefined;
    replyTo?: string | string[] | undefined;
    subject?: string | undefined;
    text?: string | undefined;
    html?: string | undefined;
    headers?: Object | undefined;
    attachments?: Object[] | undefined;
    mailComposer?: MailComposer | undefined;
  }

  interface CustomEmailOptions extends EmailOptions {
    packageSettings?: unknown;
  }

  /** @deprecated */
  function send(options: EmailOptions): void;
  function sendAsync(options: EmailOptions): Promise<void>;
  function hookSend(fn: (options: EmailOptions) => boolean): void;
  function customTransport(fn: (options: CustomEmailOptions) => void): void;
}

export interface MailComposerOptions {
  escapeSMTP: boolean;
  encoding: string;
  charset: string;
  keepBcc: boolean;
  forceEmbeddedImages: boolean;
}

export declare var MailComposer: MailComposerStatic;

export interface MailComposerStatic {
  new (options: MailComposerOptions): MailComposer;
}

export interface MailComposer {
  addHeader(name: string, value: string): void;
  setMessageOption(from: string, to: string, body: string, html: string): void;
  streamMessage(): void;
  pipe(stream: any /** fs.WriteStream **/): void;
}