一个小程序，可以虚拟SMTP服务器，当时设计的用途主要是我的域名邮箱MX指向是否正确，给自己邮件发一封EMAIL，即可看到效果-a small procedure, the virtual SMTP server, The design of the main purposes of my MX domain name plate at the right to own a mail EMAIL. can see results

邮箱服务器，实现简单的邮件服务器功能，能收发电子邮件，自行建立邮件域名-E-mail server, mail server features simple, can send and receive email, create your own mail domain name