Indsætte chartset i php kode.

<?php
function escapeAddr($addr) {
    $check = preg_match('/(.*)<(.*)>/', $addr, $a);
    if ($check) $addr = '=?UTF-8?B?'.base64_encode($a[1]).'?= <'.$a[2].'>';
    return $addr;
}
function mail_utf8($to, $subject='Intet emne', $message='', $from='', $cc='', $bcc='', $type='plain') {
    $from = escapeAddr($from);
    $header = 'From: '.$from.PHP_EOL
            . 'Return-Path: '.$from.PHP_EOL
            . 'Reply-To: '.$from.PHP_EOL
            . 'MIME-Version: 1.0'.PHP_EOL
            . 'Content-type: text/'.$type.'; charset=UTF-8'.PHP_EOL
            . 'X-Mailer: PHP/'.phpversion().PHP_EOL
            . 'Content-Transfer-Encoding: 8bit'.PHP_EOL;
    if ($cc!='') $header .= 'Cc: '.escapeAddr($cc).PHP_EOL;
    if ($bcc!='') $header .= 'Bcc: '.escapeAddr($bcc).PHP_EOL;
    $header .= PHP_EOL;
    return mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header);
}

if(isset($_POST['email'])) { 
   
    $subject = 'Anbefaling fra en ven!';
       
    $message = "En af dine venner anbefaler dig et link til vores virksomhedsprofil på ja light and sound´s hjemmeside: http://jalightandsound.dk/profil.htm \r\n\r\n";
   
    $from = 'http://jalightandsound.dk/profil.htm <info@jalightandsound.dk>';
           
    $sent = @mail_utf8($_POST['email'], $subject, $message, $from);
    if (!$sent) {
        die('Indtast en gyldig e-mailadresse');
    }
}
?>

<form ...... target="popForm">

<input name="submit" type="submit" class="sendknap_anbefal" onClick="return popitup('anbefal_side_profil.php','popForm')" value="">