my first entry, php ajax contact form was rejected

[rajibdebslg]

My first entry, php ajax contact form was rejected. The source code can be found here,

https://drive.google.com/file/d/1I-s8GAjk9PGjZw8QR5AYbQB3_O7pEW10/view?usp=sharing

It will be very helpful for me if someone can tell me why this entry was rejected.

Thanks in advance!