Brightbytes::Sendgrid

This gem allows for painless integration between ActionMailer and the SendGrid SMTP API. The current scope of this gem is focused around setting configuration options for outgoing email (essentially, setting categories, filters and the settings that can accompany those filters).

SendGrid's service allows to automatically include Unsubscribe link into your emails. Unfortunately, SendGrid doesn't manage multiple unsubscriptions lists based on your's emails categories.

Visit SendGrid SMTP API to learn more.

Add this line to your application's Gemfile:

gem 'brightbytes-sendgrid'

And then execute:

$ bundle

Or install it yourself as:

$ gem install brightbytes-sendgrid

In your config/initializers/sendgrid.rb:

ActionMailer::Base.send :include, Brightbytes::Sendgrid

Brightbytes::Sendgrid.configure do |config|
  config.default_categories :system
  config.unsubscribe_categories :system, :onboarding
  config.unsubscribe_url 'http://brightbytes.net/unsubscribe'
end

Or use it with selected mailers:

Brightbytes::Sendgrid

You can use following methods to set both global and per-email SendGrid SMTP API header options:

sendgrid_substitute

sendgrid_substitute :full_name, ['Jack', 'John']
sendgrid_substitute '{{some_text}}', 'another text'

sendgrid_section

sendgrid_section :greeting, I18n.translate('Hello')

sendgrid_unique_args

sendgrid_unique_args email_id: 12345

sendgrid_categories

sendgrid_categories :newsletter

sendgrid_recipients

sendgrid_recipients 'email1@email.com', 'email2@email.com'

sendgrid_enable

sendgrid_enable :opentrack

sendgrid_disable

sendgrid_disable :clicktrack

sendgrid_bcc

sendgrid_bcc 'some@email.com'

It is not a SendGrid subscriptiontrack filter!

What we diong here is just collecting recipients and generating unsubscribe links for every recipient. Those links will be sent as a substitutions to SendGrid.

So, to make this feature work, you have to:

1. Configure unsubscribe categories. It will trigger link generator

    config.unsubscribe_categories [:newsletter, :notifications]
   

2. Configure an unsubscribe_url. The resulting URL will be composed of unsubscribe_url and email and category parameters.

    config.unsubscribe_url 'http://domain.com/unsubscribe'
    config.unsubscribe_url Proc.new { |params| your_way_to_build_the_url(params) }
   

3. Put {{unsubscribe_html}} or {{unsubscribe_text}} or {{unsubcribe_url}} placeholder somewhere in your email body. You can adjust how html and text version are built:

    config.html_link "Click <a href="%s">here to unsubscribe</a>"
    # will produce "Click <a href="URL">here to unsubscribe</a>"
    config.text_link "Go there to unsubscribe: %s"
    # will produce "Go there to unsubscribe: URL"
   

##Contributors

This gem is written using code samples from:

• http://github.com/stephenb/sendgrid
• https://github.com/kylejginavan/sendgrid_smtpapi