If you are not sure about your PHP mail() working or not on your server then you can manually check it with coding. You can upload simple code and can check at your end.
You just have to upload below code in your PHP file and then you can check, you are getting mail or not.
Here you have to use your email address.
You just have to upload below code in your PHP file and then you can check, you are getting mail or not.
Code:
<?php
$dest = "destination@domain.com";
$fromuser = "user@domain.com";
mail("<$dest>","Test from php mail","Test","From:<$fromuser>","-f$fromuser");
?>