使用Postmarkapp在Rails应用程序中处理电子邮件异常的最佳方法是什么？

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
  :address => "smtp.postmarkapp.com",
  :port => 25,
  :authentication => :plain,
  :user_name => "YOUR_POSTMARK_API_TOKEN",
  :password => "YOUR_POSTMARK_API_TOKEN"
}

class UserMailer< ApplicationMailer
  default from: "noreply@example.com"

  def email_exception(exception)
    @exception = exception
    mail(to: "admin@example.com", subject: "Exception occurred in Rails application")
  end
end

<h1>Exception occurred in Rails application</h1>
<p>
  Message: <%= @exception.message %>
</p>
<p>
  Backtrace: <%= @exception.backtrace.join("<br>") %>
</p>

class ExceptionNotifier
  def self.notify(exception)
    UserMailer.email_exception(exception).deliver_now
  end
end

module Rails
  class Application
    def self.report_exception(exception)
      ExceptionNotifier.notify(exception)
    end
  end
end

config.middleware.use ExceptionNotification::Rack,
  :email => {
    :email_prefix => "[ERROR] ",
    :sender_address => %{"notifier" <<EMAIL>>},
    :exception_recipients => %w{admin@example.com}
  }