Sub-Domain Issue

I have created a sub-domain for mail , but I can not point it to my mail address.

sub-domain is : mail.mykfcexperience.us

why it is not getting mail.

i have created and put as the folder public_html\mail 

I also put an index.html.

Any solutino for this issue ?

What exactly do you want to have? Emails into public_html/mail? That's impossible.