Неправильная кодировка обратной связи

<?php
/* 
    Spark – Simple and Effective 
    Rev. 6
*/
 
 
// Replace the email address with the one that should receive the contact form inquiries.
define('TO_EMAIL', 'lider-pr@mail.ru');
 
// === You don't need to change anything else. ===
 
 
 
$aErrors = array();
$aResults = array();
 
/* Functions */
 
function stripslashes_if_required($sContent) {
 
    if(get_magic_quotes_gpc()) {
        return stripslashes($sContent);
    } else {
        return $sContent;
    }
}
 
function get_current_url_path() {
 
    $sPageUrl = "http://".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
    $count = strlen(basename($sPageUrl));
    $sPagePath = substr($sPageUrl,0, -$count);
    return $sPagePath;
}
 
function output($aErrors = array(), $aResults = array()){ // Output JSON
 
    $bFormSent = empty($aErrors) ? true : false;
    $aCombinedData = array(
        'bFormSent' => $bFormSent,
        'aErrors' => $aErrors,
        'aResults' => $aResults
        );
        
    header('Content-type: application/json');
    echo json_encode($aCombinedData);
    exit;
}
 
// Check supported version of PHP
if (version_compare(PHP_VERSION, '5.2.0', '<')) { // PHP 5.2 is required for the safety filters used in this script
 
    $aErrors[] = 'Unsupported PHP version. <br /><em>Minimum requirement is 5.2.<br />Your version is '. PHP_VERSION .'.</em>';
    output($aErrors);
}
 
 
if (!empty($_POST)) { // Form posted?
 
    // Get a safe-sanitized version of the posted data
    $sFromEmail = filter_input(INPUT_POST, 'email', FILTER_SANITIZE_EMAIL);
    $sFromName = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW);
    $sMessage  = stripslashes_if_required($_POST['message']);
    $sMessage .= "\r\n--\r\nEmail sent from ". get_current_url_path();
    
    $sHeaders  = "From: '$sFromName' <$sFromEmail>"."\r\n";
    $sHeaders .= "Reply-To: '$sFromName' <$sFromEmail>";
    
    if (filter_var($sFromEmail, FILTER_VALIDATE_EMAIL)) { // Valid email format?
    
        $bMailSent = mail(TO_EMAIL, "New inquiry from $sFromName", $sMessage, $sHeaders);
        if ($bMailSent) {
            $aResults[] = "Спасибо, ваше сообщение отправленно!!";
        } else {
            $aErrors[] = "Сообщение не отправленно, пожалуйста заполните заново.";
        }
 
    } else {
        $aErrors[] = 'Неправильный email адрес.';
    }
} else { // Nothing posted
    $aErrors[] = 'Empty data submited.';
}
 
  
output($aErrors, $aResults);