This system is an online mass mailing system developed with PHP+jquery. It has no database and is completely open source. The configuration instructions are as follows: 1. SMTP settings modification file: sendmail.php, modify according to comments 2. Add a mailing list and modify the t.txt file under mail. Note: Each mailbox name is one line. Do not add other marks. 3. Email sending speed settings modify the time settings in the file: index.html 4. The home page file is index.html