Forged email address

Counterfeit email address-Linux Enterprise Application-Linux server application information. Read the following for details. In the opinion of outsiders, it seems that it is very incomprehensible. In fact, when you understand the principle of SMTP protocol, you will know how simple it is. The key lies in "mail header ", because many commercial email systems do not display the complete email header, but the mail address shown above is not necessary information, and the mail system does not verify its legitimacy. Of course, with the development of technology, many methods have been adopted for SMTP servers in the future to prevent this problem, but there are still some solutions.