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Action Mailer allows you to send emails from your application using a mailer model ... another is to put it in a before_create callback in the user model

  • ActionMailer supports three callbacks
    • before_action
    • after_action
    • around_action

Provide these in our Mailer class

class UserMailer < ApplicationMailer
  after_action :set_delivery_options, :prevent_delivery_to_guests, :set_business_headers
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Then create these methods under the private keyword

private
  def set_delivery_options
  end

  def prevent_delivery_to_guests
  end

  def set_business_headers
  end
end
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