Problema invio e-mail in WebSite X5

[harley]

Questo è il codice contenuto in un file imemail.inc.php
che mi crea un software.
Praticamente mi succede che quando mi arriva una mail letta con outlook expres o con qualunque altro software la mail mi arriva in formato html completamente spaginata.Invece letta direttamente da web e perfettamente formattatta
Il problema si verifica solo utilizzando l'host aruba linux (su tutti gli altri host nessun problema) contattato aruba e loro sostengono che non è un problema dei loro server.
Ora mi potete dare qualche consiglio su come modificare questo codice per il risolvere il problema?
Grazie
Saluti
<?php
//Incomedia WebSite X5 EMail Class. All rights reserved.
class imEMail {
var $from;
var $to;
var $subject;
var $charset;
var $text;
var $html;

var $attachments;

function imEMail($from,$to,$subject,$charset) {
$this->from = $from;
$this->to = $to;
$this->subject = $subject;
$this->charset = $charset;
}

function setFrom($from) {
$this->from = $from;
}

function setTo($to) {
$this->to = $to;
}

function setSubject($subject) {
$this->subject = $subject;
}

function setCharset($charset) {
$this->charset = $charset;
}

function setText($text) {
$this->text = $text;
}

function setHTML($html) {
$this->html = $html;
}

function attachFile($name,$content,$mime_type) {
$attachment['name'] = $name;
$attachment['content'] = base64_encode($content);
$attachment['mime_type'] = $mime_type;
$this->attachments[] = $attachment;
}

function send() {
if($this->from == "" || $this->to == "" || ($this->text == "" && $this->html == ""))
return false;

$boundary = md5(time());

$headers .= "From: " . $this->from . "\r\n";
$headers .= "Message-ID: <" . time() . rand(0,9) . rand(0,9) . "@websitex5.users>\r\n";
$headers .= "X-Mailer: WebSiteX5 Mailer\r\n";

$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"" . $boundary . "\"\r\n\r\nThis is a multi-part message in MIME format\r\n\r\n";

$msg = "--" . $boundary . "\r\n";

if($this->html == "") {
$msg .= "Content-Type: text/plain; charset=" . $this->charset . "\r\n";
$msg .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
$msg .= $this->text . "\r\n\r\n";
}
else if($this->text == "") {
$msg .= "Content-Type: text/html; charset=" . $this->charset . "\r\n";
$msg .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
$msg .= $this->html . "\r\n\r\n";
}
else {
$alt_boundary = $boundary . "_alt";
$msg .= "Content-Type: multipart/alternative; boundary=\"" . $alt_boundary . "\"\r\n\r\n";

$msg .= "--" . $alt_boundary . "\r\n";
$msg .= "Content-Type: text/plain; charset=" . $this->charset . "\r\n";
$msg .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$msg .= $this->text . "\r\n\r\n";

$msg .= "--" . $alt_boundary . "\r\n";
$msg .= "Content-Type: text/html; charset=" . $this->charset . "\r\n";
$msg .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$msg .= $this->html . "\r\n\r\n";

$msg .= "--" . $alt_boundary . "--\r\n\r\n";
}

if(is_array($this->attachments)) {
foreach($this->attachments as $attachment) {
$msg .= "--" . $boundary . "\r\n";
$msg .= "Content-Type: " . $attachment["mime_type"] . "; name=\"" . $attachment["name"] . "\"\r\n";
$msg .= "Content-Transfer-Encoding: base64\r\n";
$msg .= "Content-Disposition: attachment; filename=\"" . $attachment["name"] . "\"\r\n\r\n";
$msg .= chunk_split($attachment["content"]) . "\r\n\r\n";
}
}

$msg .= "--" . $boundary . "--\r\n\r\n";

$r = @mail($this->to, $this->subject, $msg, $headers, "-f" . $this->from);
if(!$r) {
$headers = "To: " . $this->to . "\r\n" . $headers;
$r = @mail($this->to, $this->subject, $msg, $headers);
}
return $r;
}
}
?>