SendGrid
Last updated 20 October 2020
Table of Contents
SendGrid is an add-on for providing scalable email delivery and analytics for apps.
SendGrid’s cloud-based email infrastructure relieves businesses of the cost and complexity of maintaining custom email systems. SendGrid provides reliable delivery, scalability and real-time analytics along with flexible APIs that make custom integration a breeze.
Provisioning the add-on
SendGrid can be attached to a Heroku application via the CLI:
A list of all plans available can be found here .
$ heroku addons:create sendgrid:starter
-----> Adding sendgrid:starter to sharp-mountain-4005... done, v18 (free)
Once SendGrid has been added a SENDGRID_USERNAME, SENDGRID_PASSWORD settings will be available in the app configuration and will contain the credentials used to access the newly provisioned SendGrid service instance. This can be confirmed using the heroku config:get command.
$ heroku config:get SENDGRID_USERNAME
appXYZ@heroku.com
$ heroku config:get SENDGRID_PASSWORD
password
Obtaining an API key
API Keys are used by your application, mail client, or website to authenticate access to SendGrid services. They are the preferred alternative to using a username and password because you can revoke an API key at any time without having to change your username and password. We suggest that you use API keys for connecting to all of SendGrid’s services.
Create an API key
Go here. When you click the “Create API Key” button, a dropdown menu will appear allowing you to choose the type of API Key you would like to create. After selecting “General API Key” you will be shown a page allowing you to give your new key a name and permissions.
The API Key name will follow your API key around through the SendGrid customer portal, so it is important that you choose a name that is meaningful to you.
Full documentation can be found here.
After installing SendGrid and creating an API Key the application should be configured to fully integrate with the add-on.
Setup API key environment variable
Use the Heroku CLI’s config commands to add your API Key to be used by your applications:
$ heroku config:set SENDGRID_API_KEY=xxxx_api_key_xxxx
Adding config vars and restarting myapp... done, v12
SENDGRID_API_KEY: xxxx_api_key_xxxx
$ heroku config
SENDGRID_API_KEY: xxxx_api_key_xxxx
OTHER_VAR: production
$ heroku config:get SENDGRID_API_KEY
xxxx_api_key_xxxx
$ heroku config:unset SENDGRID_API_KEY
Unsetting SENDGRID_API_KEY and restarting myapp... done, v13
You can also edit config vars on your app’s settings tab on Dashboard:
Single Sender Verification
To protect your sending reputation and to uphold legitimate sending behavior, we require customers to verify their Sender Identities. To learn more about Sender Identities, please read more here.
Golang
SendGrid has a Golang helper library that facilitates the adoption of SendGrid in Golang applications. The module’s source code can be found at GitHub.
Install Package
Install sendgrid locally with the following command.
$ go get github.com/sendgrid/sendgrid-go
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
package main
import (
"fmt"
"github.com/sendgrid/sendgrid-go"
"github.com/sendgrid/sendgrid-go/helpers/mail"
"os"
)
func main() {
from := mail.NewEmail("Example User", "test@example.com")
subject := "Hello World from the SendGrid Go Library"
to := mail.NewEmail("Example User", "test@example.com")
content := mail.NewContent("text/plain", "some text here")
m := mail.NewV3MailInit(from, subject, to, content)
request := sendgrid.GetRequest(os.Getenv("SENDGRID_API_KEY"), "/v3/mail/send", "https://api.sendgrid.com")
request.Method = "POST"
request.Body = mail.GetRequestBody(m)
response, err := sendgrid.API(request)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(response.StatusCode)
fmt.Println(response.Body)
fmt.Println(response.Headers)
}
}
The NewV3MailInit constructor creates a personalization object for you. Here is an example of how to add to it.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
package main
import (
"fmt"
"github.com/sendgrid/sendgrid-go"
"os"
)
func main() {
request := sendgrid.GetRequest(os.Getenv("SENDGRID_API_KEY"), "/v3/mail/send", "https://api.sendgrid.com")
request.Method = "POST"
request.Body = []byte(` {
"personalizations": [
{
"to": [
{
"email": "test@example.com"
}
],
"subject": "Hello World from the SendGrid Go Library!"
}
],
"from": {
"email": "test@example.com"
},
"content": [
{
"type": "text/plain",
"value": "Hello, Email!"
}
]
}`)
response, err := sendgrid.API(request)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(response.StatusCode)
fmt.Println(response.Body)
fmt.Println(response.Headers)
}
}
Full documentation of all the features of SendGrid’s Go helper library can be found on GitHub.
Java
SendGrid has a Java library that facilitates the adoption of SendGrid in Java applications. The module’s source code can be found at GitHub.
Install Package
Choose your installation method - Maven w/ Gradle (recommended), Maven or Jar file.
via Maven w/ Gradle
Add the following to your build.gradle file in the root of your project.
...
dependencies {
...
compile 'com.sendgrid:sendgrid-java:3.0.9'
}
repositories {
mavenCentral()
}
...
Then import the library - in the file appropriate to your Java project.
import com.sendgrid.SendGrid;
via Maven
mvn install
via jar file
You can just drop the jar file in. It’s a fat jar - it has all the dependencies built in.
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
import com.sendgrid.*;
import java.io.IOException;
public class Example {
public static void main(String[] args) throws IOException {
Email from = new Email("test@example.com");
String subject = "Hello World from the SendGrid Java Library!";
Email to = new Email("test@example.com");
Content content = new Content("text/plain", "Hello, Email!");
Mail mail = new Mail(from, subject, to, content);
SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
Request request = new Request();
try {
request.method = Method.POST;
request.endpoint = "mail/send";
request.body = mail.build();
Response response = sg.api(request);
System.out.println(response.statusCode);
System.out.println(response.body);
System.out.println(response.headers);
} catch (IOException ex) {
throw ex;
}
}
}
See here how to add an API-K
The Mail constructor creates a personalization object for you. Here is an example of how to add to it.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
import com.sendgrid.*;
import java.io.IOException;
public class Example {
public static void main(String[] args) throws IOException {
try {
SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
Request request = new Request();
request.method = Method.POST;
request.endpoint = "mail/send";
request.body = "{\"personalizations\":[{\"to\":[{\"email\":\"test@example.com\"}],\"subject\":\"Hello World from the SendGrid Java Library!\"}],\"from\":{\"email\":\"test@example.com\"},\"content\":[{\"type\":\"text/plain\",\"value\": \"Hello, Email!\"}]}";
Response response = sg.api(request);
System.out.println(response.statusCode);
System.out.println(response.body);
System.out.println(response.headers);
} catch (IOException ex) {
throw ex;
}
}
}
Full documentation of all the features of SendGrid’s Java module can be found on GitHub.
Node.js
SendGrid has a Node.js package that facilitates the adoption of SendGrid in Node.js applications. The package’s source code can be found at GitHub.
Install Package
The following recommended installation requires npm. If you are unfamiliar with npm, see the npm docs. Npm comes installed with Node.js since node version 0.8.x therefore you likely already have it.
Add the following to your package.json file:
{
...
"dependencies": {
...
"sendgrid": "^4.2.0"
}
}
Install sendgrid-nodejs and its dependencies:
$ npm install
Alternative installation
You can also install sendgrid locally with the following command:
$ npm install sendgrid
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
var helper = require('sendgrid').mail;
var from_email = new helper.Email('test@example.com');
var to_email = new helper.Email('test@example.com');
var subject = 'Hello World from the SendGrid Node.js Library!';
var content = new helper.Content('text/plain', 'Hello, Email!');
var mail = new helper.Mail(from_email, subject, to_email, content);
var sg = require('sendgrid')(process.env.SENDGRID_API_KEY);
var request = sg.emptyRequest({
method: 'POST',
path: '/v3/mail/send',
body: mail.toJSON(),
});
sg.API(request, function(error, response) {
console.log(response.statusCode);
console.log(response.body);
console.log(response.headers);
});
The Mail constructor creates a personalization object for you. Here is an example of how to add to it.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
var sg = require('sendgrid')(process.env.SENDGRID_API_KEY);
var request = sg.emptyRequest({
method: 'POST',
path: '/v3/mail/send',
body: {
personalizations: [
{
to: [
{
email: 'test@example.com',
},
],
subject: 'Hello World from the SendGrid Node.js Library!',
},
],
from: {
email: 'test@example.com',
},
content: [
{
type: 'text/plain',
value: 'Hello, Email!',
},
],
},
});
//With promise
sg.API(request)
.then(response => {
console.log(response.statusCode);
console.log(response.body);
console.log(response.headers);
})
.catch(error => {
//error is an instance of SendGridError
//The full response is attached to error.response
console.log(error.response.statusCode);
});
//With callback
sg.API(request, function(error, response) {
if (error) {
console.log('Error response received');
}
console.log(response.statusCode);
console.log(response.body);
console.log(response.headers);
});
Full documentation of all the features of SendGrid’s Node.js module can be found on GitHub.
PHP
SendGrid has a PHP library that facilitates the adoption of SendGrid in PHP applications. The module’s source code can be found at GitHub.
Install package
Add SendGrid to your composer.json file. If you are not using Composer, you should be. It’s an excellent way to manage dependencies in your PHP application.
{
"require": {
"sendgrid/sendgrid": "~5.0.9"
}
}
Then at the top of your PHP script require the autoloader:
require 'vendor/autoload.php';
Alternative: Install package from zip
If you are not using Composer, simply download and install the latest packaged release of the library as a zip.
⬇︎ Download Packaged Library ⬇︎
Then require the library from package:
require("path/to/sendgrid-php/sendgrid-php.php");
Previous versions of the library can be found in the version index.
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
<?php
// If you are using Composer
require 'vendor/autoload.php';
// If you are not using Composer (recommended)
// require("path/to/sendgrid-php/sendgrid-php.php");
$from = new SendGrid\Email(null, "test@example.com");
$subject = "Hello World from the SendGrid PHP Library!";
$to = new SendGrid\Email(null, "test@example.com");
$content = new SendGrid\Content("text/plain", "Hello, Email!");
$mail = new SendGrid\Mail($from, $subject, $to, $content);
$apiKey = getenv('SENDGRID_API_KEY');
$sg = new \SendGrid($apiKey);
$response = $sg->client->mail()->send()->post($mail);
echo $response->statusCode();
echo $response->headers();
echo $response->body();
The SendGrid\Mail constructor creates a personalization object for you. Here is an example of how to add to it.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
<?php
// If you are using Composer
require 'vendor/autoload.php';
// If you are not using Composer (recommended)
// require("path/to/sendgrid-php/sendgrid-php.php");
$request_body = json_decode('{
"personalizations": [
{
"to": [
{
"email": "test@example.com"
}
],
"subject": "Hello World from the SendGrid PHP Library!"
}
],
"from": {
"email": "test@example.com"
},
"content": [
{
"type": "text/plain",
"value": "Hello, Email!"
}
]
}');
$apiKey = getenv('SENDGRID_API_KEY');
$sg = new \SendGrid($apiKey);
$response = $sg->client->mail()->send()->post($request_body);
echo $response->statusCode();
echo $response->body();
echo $response->headers();
Full documentation of all the features of SendGrid’s PHP library can be found on GitHub.
Python
SendGrid has a Python module that facilitates the adoption of SendGrid in Python applications. The module’s source code can be found at GitHub.
Install Package
$ pip install sendgrid
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
import sendgrid
import os
from sendgrid.helpers.mail import *
sg = sendgrid.SendGridAPIClient(apikey=os.environ.get('SENDGRID_API_KEY'))
from_email = Email("test@example.com")
subject = "Hello World from the SendGrid Python Library!"
to_email = Email("test@example.com")
content = Content("text/plain", "Hello, Email!")
mail = Mail(from_email, subject, to_email, content)
response = sg.client.mail.send.post(request_body=mail.get())
print(response.status_code)
print(response.body)
print(response.headers)
The Mail constructor creates a personalization object for you. Here is an example of how to add to it.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
import sendgrid
import os
sg = sendgrid.SendGridAPIClient(apikey=os.environ.get('SENDGRID_API_KEY'))
data = {
"personalizations": [
{
"to": [
{
"email": "test@example.com"
}
],
"subject": "Hello World from the SendGrid Python Library!"
}
],
"from": {
"email": "test@example.com"
},
"content": [
{
"type": "text/plain",
"value": "Hello, Email!"
}
]
}
response = sg.client.mail.send.post(request_body=data)
print(response.status_code)
print(response.body)
print(response.headers)
Full documentation of all the features of SendGrid’s Python module can be found on GitHub.
Ruby
SendGrid has a Ruby gem that facilitates the adoption of SendGrid in Ruby applications. The module’s source code can be found at GitHub.
Install Package
Add this line to your application’s Gemfile:
$ gem 'sendgrid-ruby'
And then execute:
$ bundle
Or install it yourself using:
$ gem install sendgrid-ruby
Example
See here how to add an API-KEY in your App Environment .
The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):
With Mail Helper Class
require 'sendgrid-ruby'
include SendGrid
from = Email.new(email: 'test@example.com')
subject = 'Hello World from the SendGrid Ruby Library!'
to = Email.new(email: 'test@example.com')
content = Content.new(type: 'text/plain', value: 'Hello, Email!')
mail = Mail.new(from, subject, to, content)
sg = SendGrid::API.new(api_key: ENV['SENDGRID_API_KEY'])
response = sg.client.mail._('send').post(request_body: mail.to_json)
puts response.status_code
puts response.body
puts response.headers
For more complex scenarios, please do not use the above constructor and instead build your own personalization object as demonstrated here.
Without Mail Helper Class
The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):
require 'sendgrid-ruby'
include SendGrid
data = JSON.parse('{
"personalizations": [
{
"to": [
{
"email": "test@example.com"
}
],
"subject": "Hello World from the SendGrid Ruby Library!"
}
],
"from": {
"email": "test@example.com"
},
"content": [
{
"type": "text/plain",
"value": "Hello, Email!"
}
]
}')
sg = SendGrid::API.new(api_key: ENV['SENDGRID_API_KEY'])
response = sg.client.mail._("send").post(request_body: data)
puts response.status_code
puts response.body
puts response.headers
ActionMailer
Configure ActionMailer to Use SendGrid
In config/environment.rb specify your ActionMailer settings to point to SendGrid’s servers.
ActionMailer::Base.smtp_settings = {
:user_name => ENV['SENDGRID_USERNAME'],
:password => ENV['SENDGRID_PASSWORD'],
:domain => 'yourdomain.com',
:address => 'smtp.sendgrid.net',
:port => 587,
:authentication => :plain,
:enable_starttls_auto => true
}
If you want different settings for ActionMailer depending on the environment, update the config/environments/{environment}.rb with:
# Setup the mailer config
config.action_mailer.delivery_method = :smtp
config.action_mailer.perform_deliveries = true
config.action_mailer.smtp_settings = {
:user_name => ENV['SENDGRID_USERNAME'],
:password => ENV['SENDGRID_PASSWORD'],
:domain => 'yourdomain.com',
:address => 'smtp.sendgrid.net',
:port => 587,
:authentication => :plain,
:enable_starttls_auto => true
}
Dashboard
For more information on the features available within the SendGrid dashboard please see the docs at sendgrid.com/docs.
SendGrid offers statistics a number of different metrics to report on what is happening with your messages.
The dashboard can be accessed via the CLI:
$ heroku addons:open sendgrid
Opening sendgrid for sharp-mountain-4005…
or by visiting the Heroku Dashboard and selecting the application in question. Select SendGrid from the Add-ons menu.
Migrating between plans
Plan migrations are easy and instant. Use the heroku addons:upgrade command to migrate to a new plan.
$ heroku addons:upgrade sendgrid:platinum
-----> Upgrading sendgrid:platinum to sharp-mountain-4005... done, v18 ($399.95/mo)
Your plan has been updated to: sendgrid:platinum
Removing the add-on
SendGrid can be removed via the CLI. If you accidentally remove the SendGrid add-on, re-adding SendGrid will resume your access to the account
$ heroku addons:destroy sendgrid
-----> Removing sendgrid from sharp-mountain-4005... done, v20 (free)
Support
All SendGrid support and runtime issues should be submitted via on of the Heroku Support channels. Any non-support related issues or product feedback is welcome at http://support.sendgrid.com/home.
Additional resources
Additional resources are available at: