SendGrid::Ruby

This Gem allows you to quickly and easily send emails through SendGrid's Web API using native Ruby.

You can read our official documentation on the Web API's Mail feature here.

Installation

Add this line to your application's Gemfile:

gem 'sendgrid-ruby'

And then execute:

$ bundle

Or install it yourself using:

$ gem install sendgrid-ruby

Usage

Create a new client with your SendGrid Username and Password.

require 'sendgrid-ruby'

# As a hash
client = SendGrid::Client.new(api_user: 'SENDGRID_USERNAME', api_key: 'SENDGRID_PASSWORD')

# Or as a block
client = SendGrid::Client.new do |c|
  c.api_user = 'SENDGRID_USERNAME'
  c.api_key = 'SENDGRID_PASSWORD'
end

# or as a block with the API key only #
client = SendGrid::Client.new do |c|
  c.api_key = 'SENDGRID_APIKEY'
end

Create a new Mail object and send:

mail = SendGrid::Mail.new do |m|
  m.to = '[email protected]'
  m.from = '[email protected]'
  m.subject = 'Hello world!'
  m.text = 'I heard you like pineapple.'
end

res = client.send(mail)
puts res.code
puts res.body
# 200
# {"message"=>"success"}

You can also create a Mail object with a hash:

res = client.send(SendGrid::Mail.new(to: '[email protected]', from: '[email protected]', subject: 'Hello world!', text: 'Hi there!', html: '<b>Hi there!</b>'))
puts res.code
puts res.body
# 200
# {"message"=>"success"}

Attachments

Attachments can be added to a Mail object with the add_attachment method. The first parameter is the path to the file, the second (optional) parameter is the desired name of the file. If a file name is not provided, it will use the original filename.

mail.add_attachment('/tmp/report.pdf', 'july_report.pdf')

Inline Content

Inline content can be added to a Mail object with the add_content method. The first parameter is the path to the file, the second parameter is the cid to be referenced in the html.

mail = SendGrid::Mail.new do |m|
  m.to = '[email protected]'
  m.from = '[email protected]'
  m.subject = 'Hello world!'
  m.text = 'I heard you like the beach.'
  m.html = 'I heard you like the beach <div><img src="cid:beach"></div>'
end
mail.add_content('/tmp/beach.jpg', 'beach')
result = client.send(mail)

Available Params

params = {
    :to,
    :to_name,
    :from,
    :from_name,
    :subject,
    :text,
    :html,
    :cc,
    :cc_name,
    :bcc,
    :bcc_name,
    :reply_to,
    :date,
    :smtpapi,
    :attachments,
    :template
}

Setting Params

Params can be set in the usual Ruby ways, including a block or a hash.

mail = SendGrid::Mail.new do |m|
  m.to = '[email protected]'
  m.from = '[email protected]'
end

client.send(SendGrid::Mail.new(to: '[email protected]', from: '[email protected]'))

:to

Using the :to param, we can pass a single email address as a string, or an array of email address strings.

mail = SendGrid::Mail.new
mail.to = '[email protected]'
# or
mail.to = ['Example Dude <[email protected]>', '[email protected]']
# or
mail.to = ['[email protected]', '[email protected]']

:from

mail = SendGrid::Mail.new
mail.from = '[email protected]'

:cc

As with :to, :cc can take a single string or an array of strings.

mail = SendGrid::Mail.new
mail.cc = ['[email protected]', '[email protected]']

:bcc

As with :to and :cc, :bcc can take a single string or an array of strings.

mail = SendGrid::Mail.new
mail.bcc = ['[email protected]', '[email protected]']

:subject

mail = SendGrid::Mail.new
mail.subject = 'This is a subject string'

Email Bodies:

:text

Using the :text param allows us to add plain text to our email body.

mail = SendGrid::Mail.new
mail.text = 'WHATTUP KITTY CAT!?'

:html

Using the :html param allows us to add html content to our email body.

mail = SendGrid::Mail.new
mail.html = '<html><body>Stuff in here, yo!</body></html>'

:template

The :template param allows us to specify a template object for this email to use. The initialized Template will automatically be included in the smtpapi header and passed to SendGrid.

template = SendGrid::Template.new('MY_TEMPLATE_ID')
mail.template = template

Working with Templates

Another easy way to use the SendGrid Templating system is with the Recipient, Mail, Template, and TemplateMailer objects.

Create some Recipients

users = User.where(email: ['[email protected]', '[email protected]'])

recipients = []

users.each do |user|
  recipient = SendGrid::Recipient.new(user.email)
  recipient.add_substitution('first_name', user.first_name)
  recipient.add_substitution('city', user.city)

  recipients << recipient
end

Create a Template

template = SendGrid::Template.new('MY_TEMPLATE_ID')

Create a Client

client = SendGrid::Client.new(api_user: my_user, api_key: my_key)

Initialize mail defaults and create the TemplateMailer

mail_defaults = {
  from: '[email protected]',
  html: '<h1>I like email</h1>',
  text: 'I like email',
  subject: 'Email is great',
}

mailer = SendGrid::TemplateMailer.new(client, template, recipients)

Mail it!

mailer.mail(mail_defaults)

Using SendGrid's X-SMTPAPI Header

To utilize the X-SMTPAPI header, we have directly integrated the SendGridJP/smtpapi-ruby gem. For more information, view our SMTPAPI docs page.


header = Smtpapi::Header.new
header.add_to(['[email protected]', '[email protected]'])
header.add_substitution('keep', ['secret'])        # sub = {keep: ['secret']}
header.add_substitution('other', ['one', 'two'])   # sub = {keep: ['secret'], other: ['one', 'two']}
header.add_unique_arg("unique_code", "8675309")
header.add_category("Newsletter")
header.add_filter('templates', 'enable', 1)    # necessary for each time the template engine is used
header.add_filter('templates', 'template_id', '1234-5678-9100-abcd')
header.set_ip_pool("marketing_ip_pool")
mail.smtpapi = header

Testing

bundle exec rake test

Deploying

Confirm tests pass bundle exec rake test
Bump the version in lib/sendgrid/version.rb and spec/lib/sendgrid_spec.rb
Update CHANGELOG.md
Commit Version bump vX.X.X
rake release
Push changes to GitHub
Release tag on GitHub vX.X.X

Contributing

Fork it ( https://github.com/[my-github-username]/sendgrid-ruby/fork )
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create a new Pull Request

Hit up @rbin or @sendgrid on Twitter with any issues.