add this code in wp-admin > Plugins > editor > Select WPLMS Customizer Plugin > wplms-customizer.php // Optionally change your email address

add_filter('wp_mail_from','noreply_from');
function noreply_from($from) {
return 'noreply@YOUR_DOMAIN.org'; //Replace 'YOUR_DOMAIN.org' with email address
}
// Optionally change your from name
add_filter('wp_mail_from_name','noreply_from_name');
function noreply_from_name($name) {
return 'YOUR_DOMAIN No-Reply';  //Replace ‘YOUR_DOMAIN No-Reply’ with the name you want to show
}

Well this cannot be changed its mail server identification . 

You need to contact web host for this.