email.rb

require_relative 'bundle/bundler/setup'
require 'iron_worker'
require 'sendgrid-ruby'

client = SendGrid::Client.new(api_key: 'SENDGRID_APIKEY')

mail = SendGrid::Mail.new do |m|
  m.to      = IronWorker.payload["to"]
  m.from    = IronWorker.payload["from"]
  m.subject = IronWorker.payload["subject"]
  m.text    = IronWorker.payload["text"]
end

res = client.send(mail)
puts res.code
puts res.body