SendGrid gem for Rails¶ ↑

SendGrid gem provides ActionMailer::Base extensions to use SendGrid API features in you emails. It extends ActionMailer with next methods:

substitute(patters_string, array_of_substitunion_strings)
uniq_args(hash_of_unique_args)
category(category_string)
open_tracking(enabled = true)
add_filter_setting(filter_name, setting_name, value)

Rails 3 configuration¶ ↑

In your Gemfile:

gem 'sendgrid-rails', '~> 2.0'

In your config/environment.rb:

ActionMailer::Base.register_interceptor(SendGrid::MailInterceptor)

ActionMailer::Base.smtp_settings = {
  :address => 'smtp.sendgrid.net',
  :port => '25',
  :domain => 'example.com',
  :authentication => :plain,
  :user_name => 'login@example.com',
  :password => 'your password'
}

Usage examples¶ ↑

Adding multiple recipients:¶ ↑

class Mailer < ActionMailer::Base
  default :from => 'no-reply@example.com',
          :subject => 'An email sent via SendGrid'

  def email_with_multiple_recipients
    mail :to => %w(email1@email.com email2@email.com)
  end
end

Adding substitution vars¶ ↑

Mailer class definition:

class Mailer < ActionMailer::Base
  default :from => 'no-reply@example.com',
          :subject => 'An email sent via SendGrid with substitutions'

  def email_with_substitutions
    substitute '-user_name-', %w(User1 User2)

    mail :to => %w(email1@email.com email2@email.com), :body => "Hello, -user_name-!"
  end
end

Adding category¶ ↑

Mailer class definition:

    class Mailer < ActionMailer::Base
      default :from => 'no-reply@example.com',
              :subject => 'An email sent via SendGrid with substitutions'

      def email_with_category
        category 'SendGridRocks'
        mail :to => 'email1@email.com'
      end
    end

Apps (formerly called Filters)¶ ↑

Apps can be applied to any of your email messages and can be configured through SendGrid gem.

Open Tracking¶ ↑

Add an invisible image at the end of the email to track e-mail opens. If the email recipient has images enabled on the email client, a request to server for the invisible image is executed and an open is logged.

class Mailer < ActionMailer::Base
  default :from => 'no-reply@example.com',
          :subject => 'An email sent via SendGrid'

  def email_with_open_tracking_enabled
    open_tracking true
    mail :to => 'email@email.com'
  end
end

Change log¶ ↑

v2.0

• Using mail interceptor

• ActionMailer::Base#add_recipients - removed

• Standard SMTP To attribute get nullified after recipients added to X-SMTPAPI header