Send Email from Gmail to Slack with Google Script

Published in: Gmail - Google Apps Script

You can easily publish important email messages coming into your Gmail to a Slack channel using Google Apps Script. Your Slack channel has a Webhook URL and you can send a POST HTTP request to this URL with the email message in JSON format as the payload parameter.

You can archive the message, or apply a specific Gmail label, to prevent duplicate posts in Slack for the same message. Credit: @matsuyoro

var postUrl = '';
var postChannel = '#labnol';

function postGmailToSlack() {
  var threads = GmailApp.getInboxThreads();

  for (var m in threads) {
      threads[m].getFirstMessageSubject() +
        ' link:' +

function sendHttpPost(message, username) {
  var jsonData = {
    channel: postChannel,
    username: username,
    text: message,
  var payload = JSON.stringify(jsonData);
  var options = {
    method: 'post',
    contentType: 'application/json',
    payload: payload,

  UrlFetchApp.fetch(postUrl, options);
Published in: Gmail - Google Apps Script

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Web Geek, Tech Columnist
Amit Agarwal

Amit Agarwal is a Google Developer Expert in GSuite and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India. Read more on Lifehacker and YourStory

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