old_contents: import Sendgrid from 'sendgrid';
  
  const helper = Sendgrid.mail;
  const sender = new helper.Email('adiemerci@bisnaer.ch');
  const reciever = new helper.Email('tuelsch@gmail.com');
  const content = new helper.Content('text/plain', 'He, tsäueli');
  const subject = 'Nöis mail';
  const mail = new helper.Mail(sender, subject, reciever, content);
  const sendgrid = Sendgrid(process.env.SENDGRID_API_KEY);
  const request = sendgrid.emptyRequest({
    method: 'POST',
    path: '/v3/mail/send',
    body: mail.toJSON(),
  });
  
  export default function () {
    return sendgrid.API(request)
      .then((response) => {
        console.log(JSON.stringify(response.body));
        console.log(response.statusCode);
        console.log(response.headers);
      })
      .catch((error) => {
        console.error(JSON.stringify(error));
      });
  }
  
new_contents: import Sendgrid from 'sendgrid';
  
  const helper = Sendgrid.mail;
  const sender = new helper.Email('tuelsch@gmail.com', 'Philipp Gfeller');
  const reciever = new helper.Email('tuelsch@gmail.com');
  const content = new helper.Content('text/plain', 'He, tsäueli');
  const subject = 'Nöis mail';
  const mail = new helper.Mail(sender, subject, reciever, content);
  const sendgrid = Sendgrid(process.env.SENDGRID_API_KEY);
  const request = sendgrid.emptyRequest({
    method: 'POST',
    path: '/v3/mail/send',
    body: mail.toJSON(),
  });
  
  export default function () {
    return sendgrid.API(request)
      .then((response) => {
        console.log(JSON.stringify(response.body));
        console.log(response.statusCode);
        console.log(response.headers);
      })
      .catch((error) => {
        console.error(JSON.stringify(error));
      });
  }
  
subject: Use me as sender, for replies