Send email from SendGrid using Pony gem

gistfile1.rb

require 'rubygems'
require 'pony'

#set the default options
Pony.options = {
  :from => 'demo@sendgrid.com',
  :via => :smtp,
  :via_options => {
    :address        => 'smtp.sendgrid.net',
    :port           => '587',
    :user_name      => 'sendgriduser',
    :password       => 'sendgridpassword',
    :authentication => :plain
  }
}

message = Pony.mail :to => 'brandon.west@sendgrid.com', :from => 'brawest@gmail.com', :subject => 'SendGrid Delivered!', :body => 'Hello there. You look great today!'