Node.JS module to send email with PostageApp API
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

PostageApp for Node.JS

This is a module for Node.js that allows you to send emails with PostageApp, a service that makes it easy to add personalized, transactional email to your application.

API DocumentationPostageApp FAQsPostageApp Help Portal


There are several ways to install this plugin depending on your requirements. The most common method is via the Node Package Manager, NPM.


In your app directory type:

npm install postageapp --save


GIT Submodule

In your app directory type:

git submodule add plugins/postage
git submodule init
git submodule update

GIT Clone

In your node_modules directory type

git clone postageapp

Sending a Message

When you require the library, make sure to specify your API key:

var postageapp = require('postageapp')('ACCOUNT_API_KEY');

After that, you should be good to go. Load the module in your app and call the sendMessage function. Here is a sample of how to use it:

var postageapp = require('postageapp')('ACCOUNT_API_KEY');
postageapp.sendMessage(options, function callback() {});

The options parameter on the sendMessage() function is a hash that contains all of the arguments that you will be using in your API call. Here is an example API call:

var options = {
  recipients: "",

  subject: "Subject Line",
  from: "",

  content: {
    'text/html': '<strong>Sample bold content.</strong>',
    'text/plain': 'Plain text goes here'

You can use any of the arguments available to send_message.json when creating this hash.

Recipients can be passed along as a single string or as an array:

// String form: Comma separated list
recipients: ","

// Array form: Individual addresses as strings
recipients: [ "", "" ]

If you wish to set Message Variables for each individual recipient, create an object with keys representing each recipient address:

// Object form: Email address as key, object of key/values as content
recipients: {
  "": {
    'variable': 'Value'
  "": {
    'variable': 'Another Value'

Content will accept an array for HTML and plain text content:

content: {
  'text/html': '<strong>Sample bold content.</strong>',
  'text/plain': 'Plain text goes here'

Subject and from can be simple strings:

subject: 'Subject Line',
from: ''

Templates are called by using the template slug from your PostageApp projects:

template: 'sample_template'

Message Variables needs to have an array passed into it with the global variable names and values:

variables: {
  'variable': 'Variable value',
  'variable2': 'Another variable'

Success and Error Callbacks

The sendMessage() function takes two callback arguments: success and error:

var postageapp = require('postageapp')('ACCOUNT_API_KEY');

  function (response, object) {
    console.log('HTTP Status code: ', response.statusCode);
    console.log('Message UID', object.response.uid);
  }, function (err, object) {
    console.log('Ack! An error has occurred: ', err);

Getting Account Info

You can get your PostageApp account info through the Node.js plugin by using the accountInfo() function, which can be used as such:

var postageapp = require('postageapp')('ACCOUNT_API_KEY');


You can take a look at the documentation for get_account_info.json to learn about the typical response from the API.

Getting Message Status

You can the status of an individual message sent through PostageApp using the UID that your API call provides. The PostageApp plugin creates a unique UID for each message sent through by using Date.getTime(). You then use that UID in messageStatus().

var postageapp = require('postageapp')('ACCOUNT_API_KEY');


The options parameter in the messageStatus() function is a hash that contains one thing: the UID of the message you wish you retrieve:

var options = {
  desiredUID: 'message UID here',

You will receive a JSON string back from the API server that will look like:

{"response":{"status":"ok","uid":"message UID here"},"data":{"message_status":{"completed":1}}}

For more information about formatting of recipients, templates and variables please see the PostageApp documentation.