discourse/app/jobs/scheduled/clean_up_email_logs.rb

module Jobs

  class CleanUpEmailLogs < Jobs::Scheduled
    every 1.day

    def execute(args)
      return if SiteSetting.delete_email_logs_after_days <= 0

      threshold = SiteSetting.delete_email_logs_after_days.days.ago

      EmailLog.where("reply_key IS NULL")
        .where("created_at < ?", threshold)
        .delete_all

      SkippedEmailLog.where("created_at < ?", threshold).delete_all
    end

  end

end