Problem mit Header bei mail() in PHP

[Heppi]

Aktueller Code:

	function sendmail($layout, $from, $to, $subject, $title, $body, $attachedfiles = NULL, $attachedfiles_name = NULL, $cc = "", $bcc = ""){
		global $newsletter_layout;

		// Text-Mail?
		if($newsletter_layout[$layout][2] == "0")
			$textmail = true;
		else
			$textmail = false;

		// Layout der Seite laden
		if($textmail){
			$ausgabe = $body;
		}
		else{
			$ausgabe = implode('', file($newsletter_layout[$layout][2]));
			$ausgabe = str_replace('<!--body-->', imap_8bit($body), $ausgabe);
			$ausgabe = str_replace('<!--title-->', $title, $ausgabe);
			$ausgabe = str_replace('<!--bilder-->', '&nbsp;', $ausgabe);
		}

		// Email zusammensetzen
		$eol = PHP_EOL;
		$id = md5(uniqid(mt_rand(), true));
		$boundary = "----".$id;

		$header = "Content-class: urn:content-classes:message".$eol;
		$header .= "User-Agent: Free WebMail".$eol;

		$header .= "From: ".$from.$eol;

		if(!empty($cc))
			$header .= "Cc: ".$cc.$eol;

		if(!empty($bcc))
			$header .= "Bcc: ".$bcc.$eol;

		$header .= "X-Priority: 3 (Normal)".$eol;
		$header .= "Importance: Normal".$eol;
		$header .= "MIME-Version: 1.0".$eol;

		if(!empty($attachedfiles))
			$header .= "Content-Type: multipart/mixed; boundary=\"".$boundary."\"".$eol;
		else if($textmail)
			$header .= "Content-Type: text/plain; charset=iso-8859-1".$eol;
		else
			$header .= "Content-Type: text/html; charset=iso-8859-1".$eol;

		$message = '';

		if(!empty($attachedfiles)){
			$message .= "--".$boundary.$eol;

			if($textmail)
				$message .= "Content-Type: text/plain; charset=iso-8859-1".$eol;
			else
				$message .= "Content-Type: text/html; charset=iso-8859-1".$eol;

			$message .= "Content-Transfer-Encoding: quoted-printable".$eol;
			$message .= "Content-Disposition: inline".$eol;
		}

		$message .= $ausgabe.$eol.$eol;

		if(!empty($attachedfiles))
			$message .= "--".$boundary.$eol;

		for($x = 0;$x < count($attachedfiles);$x++){
			if(!empty($attachedfiles_name[$x])){
				$filename = $attachedfiles_name[$x];
			}
			else{
				$filename = explode('/', $attachedfiles[$x]);
				$filename = $filename[count($filename) - 1];
			}

			$file = fopen($attachedfiles[$x], "r");
			$content = fread($file, filesize($attachedfiles[$x]));
			fclose($file);
			$encodedfile = chunk_split(base64_encode($content));

			$message .= "Content-Type: application/octet-stream; name=\"".$filename."\"".$eol;
			$message .= "Content-Transfer-Encoding: base64".$eol;
			$message .= "Content-Description: ".$attachedfiles[$x].$eol;
			$message .= "Content-Disposition: attachment; filename=\"".$filename."\"".$eol.$eol;
			$message .= $encodedfile.$eol.$eol."--".$boundary;
		}

		if(!empty($attachedfiles))
			$message.="--";

		// Email verschicken
		if(mail($to, $subject, $message, $header))
			return true;
		else
			return false;
	}