Twilio Functions: Email to SMS with SendGrid Parse

email-to-sms.js

const from = '+1xxxxxxxxxx' // your phone number
const sender = 'address@domain.tld' // your email address

exports.handler = function (context, event, callback) {
  // use the first part of the reply-to address as destination
  const to = event.to.split('@').shift()
  
  // take only the first line of the email body as the sms message
  const body = event.text.split('\n').shift()
  
  // display a log message for debugging
  console.log('to: [%s] message: %s', to, body)

  // parse message envelope
  const envelope = JSON.parse(event.envelope)
  
  // only accept emails from yourself
  if (envelope.from !== sender) {
    console.log('invlid sender: %s ', envelope.from)
    
    // quietly fail
    return callback()
  }

  // send sms using Twilio with quiet failure
  context.getTwilioClient().messages.create({ from, to, body }, () => callback())
}