Ruby 如何在没有rails的情况下使用Actionmailer4

我在没有rails的情况下使用过ActionMailer2.3，在使用4.0组件时，使用actionmailer4的ruby代码不起作用。我现在有了有效的解决方案，我将在回答部分作出回应。

需要“rubygems”
    require 'rubygems'
    require 'action_mailer'

    ActionMailer::Base.delivery_method = :smtp
    ActionMailer::Base.smtp_settings = {
       :enable_starttls_auto => :true,
       :address => "smtp.gmail.com",
       :port => 587,
       :domain => "xxxx.com",
       :authentication => :plain,
       :user_name => "aaaa@xxxx.com",
       :password => "ppppp"
    }

    ActionMailer::Base.view_paths= File.dirname(__FILE__)

    class TEST_CLASS_email < ActionMailer::Base
      default( {from: "aaaa@xxxx.com"} )

      def sendemail(s_email)
        @var = 'TESTING VARIABLE PASSING TO VIEW'
        mail(
          to: "bbbb.cccc@dddd.com",
          subject:  "Testing out from ACTIONMAILER4",
          bcc:  s_email
        )
      end
    end

    def testemailpubmethod(email)
      begin
      e=TEST_CLASS_email.sendemail(email)
      if e.present?
        e.deliver_now 
      end
      rescue Exception => exception
        puts "Email:Exception Message: #{exception.message}" 
        puts "Error sending the email #{exception.backtrace.join("\n")}"
      end
    end

    testemailpubmethod("eeee@ffff.com")    


Now create the template files in the following subdirectory.
============================================================
./test_class_email/sendemail.text.erb
=====================================
    This is a text email from <%= @var %>
    -Have fun using Actionmailer4 :)

要求采取“行动”
ActionMailer:：Base.delivery\u方法=：smtp
ActionMailer:：Base.smtp\u设置={
：enable_starttls_auto=>：true，
：address=>“smtp.gmail.com”，
：端口=>587，
：domain=>“xxxx.com”，
：身份验证=>：普通，
：user_name=>“aaaa@xxxx.com",
：password=>“ppppp”
}
ActionMailer:：Base.view\u path=File.dirname（\uuuu File\uuuu）
类测试\u类\u电子邮件异常
放入“电子邮件：异常消息：#{Exception.Message}”
放置“发送电子邮件时出错#{exception.backtrace.join（“\n”）}”
结束
结束
测试方法（“eeee@ffff.com")    
现在在下面的子目录中创建模板文件。
============================================================
./test\u class\u email/sendmail.text.erb
=====================================
这是一封来自
-使用Actionmailer4:）享受乐趣