<?php
 $Empfaenger = "xxxxxxxxx@arcor.de"; 
 $Betreff = "Meine erste Mail mit Anhang"; 
  
 $DateinameMail = "Selbstauskunft.xfdf"; 
 $Dateiname = basename($DateinameMail);
 $Header = "Content-type: application/vnd.adobe.xfdf";
 $Header = "From: Mein Name <xxxxxxxx@arcor.de>"; 
 
 $Trenner = md5(uniqid(time())); 
 $Header .= "\n"; 
 $Header .= "MIME-Version: 1.0"; 
 $Header .= "\n"; 
 $Header .= "Content-Type: multipart/mixed; boundary=$Trenner"; 
 $Header .= "\n\n"; 
 $Header .= "This is a multi-part message in MIME format"; 
 $Header .= "\n"; 
 $Header .= "--$Trenner"; 
 $Header .= "\n"; 
  
 $Header .= "\n"; 
 $Header .= "Content-Transfer-Encoding: 64bit"; 
 $Header .= "\n\n"; 
 $Header .= "Meine erste Mail mit Anhang!"; 
 $Header .= "\n"; 
 $Header .= "--$Trenner"; 
 $Header .= "\n"; 
 $Header .= "Content-Type: application/vnd.adobe.xfdf; name=$DateinameMail"; 
 $Header .= "\n"; 
 $Header .= "Content-Transfer-Encoding: base64"; 
 $Header .= "\n"; 
 $Header .= "Content-Disposition: attachment; filename=$DateinameMail"; 
 $Header .= "\n\n"; 
 $Dateiinhalt .= fread(fopen($Dateiname, "r"), filesize($Dateiname)); 
 $Header .= chunk_split(base64_encode($Dateiinhalt)); 
 $Header .= "\n"; 
 $Header .= "--$Trenner--"; 
 
 mail($Empfaenger, $Betreff, "", $Header); 
?>