gistfile1.rb

config.action_mailer.smtp_settings = {
  :user_name => ApplicationConfig.sendgrid_username,
  :password => ApplicationConfig.sendgrid_password,
  :domain => 'yammer.com',
  :address => 'smtp.sendgrid.net',
  :port => 587,
  :authentication => :plain,
  :enable_starttls_auto => true
}