README.md in mailkick-0.4.1 vs README.md in mailkick-0.4.2

@@ -87,64 +87,78 @@
 
 ```ruby
 Mailkick.fetch_opt_outs
 ```
 
-#### Sendgrid
+The following services are supported:
 
-Add the gem
+- [Mailchimp](#mailchimp)
+- [Mailgun](#mailgun)
+- [Mandrill](#mandrill)
+- [Postmark](#postmark)
+- [SendGrid](#sendgrid)
 
-```ruby
-gem 'sendgrid_toolkit'
-```
+Will gladly accept pull requests for others.
 
-Be sure `ENV["SENDGRID_USERNAME"]` and `ENV["SENDGRID_PASSWORD"]` are set.
+#### Mailchimp
 
-#### Mandrill
+Add the gem
 
 ```ruby
-gem 'mandrill-api'
+gem 'gibbon', '>= 2'
 ```
 
-Be sure `ENV["MANDRILL_APIKEY"]` is set.
+And set `ENV["MAILCHIMP_API_KEY"]` and `ENV["MAILCHIMP_LIST_ID"]`.
 
-#### Mailchimp
+#### Mailgun
 
+Add the gem
+
 ```ruby
-gem 'gibbon', '>= 2'
+gem 'mailgun-ruby'
 ```
 
-Be sure `ENV["MAILCHIMP_API_KEY"]` and `ENV["MAILCHIMP_LIST_ID"]` are set.
+And set `ENV["MAILGUN_API_KEY"]`.
 
-#### Mailgun
+#### Mandrill
 
+Add the gem
+
 ```ruby
-gem 'mailgun-ruby'
+gem 'mandrill-api'
 ```
 
-Be sure `ENV["MAILGUN_API_KEY"]` is set.
+And set `ENV["MANDRILL_APIKEY"]`.
 
 #### Postmark
 
+Add the gem
+
 ```ruby
 gem 'postmark'
 ```
 
-Be sure `ENV["POSTMARK_API_KEY"]` is set.
+And set `ENV["POSTMARK_API_KEY"]`.
 
-#### Other
+#### SendGrid
 
-Will gladly accept pull requests.
+Add the gem
 
+```ruby
+gem 'sendgrid-ruby'
+```
+
+And set `ENV["SENDGRID_API_KEY"]`. The API key requires only the `Suppressions` permission.
+
 ### Advanced
 
 For more control over services, set them by hand.
 
 ```ruby
 Mailkick.services = [
-  Mailkick::Service::Sendgrid.new(api_key: "API_KEY"),
-  Mailkick::Service::Mandrill.new(api_key: "API_KEY")
+  Mailkick::Service::SendGridV2.new(api_key: "API_KEY"),
+  Mailkick::Service::Mailchimp.new(api_key: "API_KEY", list_id: "LIST_ID")
 ]
 ```
 
 ## Multiple Lists
 
@@ -227,5 +241,14 @@
 
 - [Report bugs](https://github.com/ankane/mailkick/issues)
 - Fix bugs and [submit pull requests](https://github.com/ankane/mailkick/pulls)
 - Write, clarify, or fix documentation
 - Suggest or add new features
+
+To get started with development and testing:
+
+```sh
+git clone https://github.com/ankane/mailkick.git
+cd mailkick
+bundle install
+bundle exec rake test
+```