async nodemailer sendmail Promise

February 24, 2023

how can I get a ‘then’, or asynchronously return an API response?
I use fastify, but it doesn’t wait for a response if you make a callback inside.
I tried that, but the error: TypeError: a.then is not a function

         const a = await transporter.sendMail(mainOptions);
            a.then((error, result) => {
                if (error) return error
                reply.send({
                  messageId: result.messageId
                })
            })

>Solution :

Simply log a:

const a = await transporter.sendMail(mainOptions);
console.log(a)

You can also catch the error with a try/catch

try {
  const a = await transporter.sendMail(mainOptions);
  console.log(a)
  reply.send({ messageId: result.messageId })
} catch (error) {
  console.error(error)
}

Looks like you are trying to send email with nodemailer. Have you tried to follow the documentation:

transporter.sendMail({
    from: 'sender@example.com',
    to: 'recipient@example.com',
    subject: 'Message',
    text: 'I hope this message gets delivered!'
}, (err, info) => {
    console.log(info.envelope);
    console.log(info.messageId);
});