class Aws::Rails::SesMailer

def deliver!(message)
  params = {
    raw_message: { data: message.to_s },
    source: message.smtp_envelope_from, # defaults to From header
    destinations: message.smtp_envelope_to # defaults to destinations (To,Cc,Bcc)
  }
  @client.send_raw_email(params).tap do |response|
    message.header[:ses_message_id] = response.message_id
  end
end