CloudRail.setAppKey("[Login to see your license key]");

Email service;

MailJet mailjet = new MailJet(
    this,
    "[Mailjet API Key]",
    "[Mailjet API Private Key]"
);

service = mailjet;

InputStream inputstream = new FileInputStream("MyFile.pdf");
String mimeType = "application/pdf";
String filename = "MyFile.pdf";
ArrayList<Attachment> attachments = new ArrayList<>();

attachments.add(new Attachment(
      inputstream,
      mimeType,
      filename
));

service.sendEmail(
    "info@cloudrail.com",
    "CloudRail",
    new ArrayList<>() {"your_name@gmail.com"},
    "CloudRail is awesome",
    "Hi there,\n\nGo ahead and try it yourself!",
    "<strong>Go ahead and try it yourself!</strong>",
    new ArrayList<>() {"your_cc_name@gmail.com"},
    new ArrayList<>() {"your_bcc_name@gmail.com"},
    attachments
);