README.rdoc in sendgrid-rails-1.1.1 vs README.rdoc in sendgrid-rails-2.0

@@ -1,25 +1,26 @@
 = SendGrid gem for Rails
 
-SendGrid gem provides ActionMailer extensions to use SendGrid API features in you emails.
+SendGrid gem provides ActionMailer::Base extensions to use SendGrid API features in you emails.
 It extends ActionMailer with next methods:
 
-    add_recipients(array_of_emails)
     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', '>=1.0.0'
+    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,
@@ -34,12 +35,11 @@
     class Mailer < ActionMailer::Base
       default :from => '[e-mail]',
               :subject => 'An email sent via SendGrid'
 
       def email_with_multiple_recipients
-        add_recipients %w([e-mail] [e-mail])
-        mail
+        mail :to => %w([e-mail] [e-mail])
       end
     end
 
 === Adding substitution vars
 
@@ -48,17 +48,30 @@
     class Mailer < ActionMailer::Base
       default :from => '[e-mail]',
               :subject => 'An email sent via SendGrid with substitutions'
 
       def email_with_substitutions
-        add_recipients %w([e-mail] [e-mail])
         substitute '-user_name-', %w(User1 User2)
 
-        mail :body => "Hello, -user_name-!"
+        mail :to => %w([e-mail] [e-mail]), :body => "Hello, -user_name-!"
       end
     end
 
+=== Adding category
+
+    Mailer class definition:
+
+        class Mailer < ActionMailer::Base
+          default :from => '[e-mail]',
+                  :subject => 'An email sent via SendGrid with substitutions'
+
+          def email_with_category
+            category 'SendGridRocks'
+            mail :to => '[e-mail]'
+          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
@@ -73,5 +86,12 @@
         open_tracking true
         mail :to => '[e-mail]'
       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