Mailer config for sendgrid add-on

config/initializers/mail.rb

@@ -0,0 +1,9 @@
+ActionMailer::Base.smtp_settings = {
+  :address        => 'smtp.sendgrid.net',
+  :port           => '587',
+  :authentication => :plain,
+  :user_name      => ENV['SENDGRID_USERNAME'],
+  :password       => ENV['SENDGRID_PASSWORD'],
+  :domain         => 'heroku.com'
+}
+ActionMailer::Base.delivery_method = :smtp