postmark.js

await postmark.sendEmail({
  From: 'api@ryanburnette.com',
  ReplyTo: `${req.body.xname} <${req.body.xemail}>`,
  To: to,
  Cc: 'api-submissions@ryanburnette.com',
  Subject: `ryanburnette.com api submission to ${req.body.form} from ${req.body.xname}`,
  HtmlBody: html,
  TextBody: text,
  MessageStream: 'outbound',
  Headers: [
    { Name: 'Message-ID', Value: record.id + '@ryanburnette.com' },
    { Name: 'X-Entity-Ref-ID', Value: record.id + '@ryanburnette.com' },
    { Name: 'References', Value: record.id + '@ryanburnette.com' }
  ]
});