--- x	2009-09-29 21:00:01.392812366 +0200
+++ perl.scrap.mime-lite-mail-sending	2009-09-29 17:56:51.900791614 +0200
@@ -1,23 +1,27 @@
+use MIME::Lite;
+$html="<b>testhtml</b>";
+$text="testtext";
my $message = MIME::Lite->build (
    From    =>'someemail',
-   To      =>'anotheremail',
# a present from peter to postfix :)
+   To      =>'jakobi',
    Subject=>'somesubject',
    Type    =>'multipart/alternative'
   );

# this is the if(1) note
   if ('i have a attachment') {
     $message->replace(Type    =>    'multipart/mixed');
     $message->attach(
         Type=> 'AUTO',
# this is your major issue: **Path being undefined**
-        Path=> $upload_file,
+        Path=> '/etc/hosts',
         Filename=>$basename,
         Disposition => 'attachment'
       );
    }
# this might be a prob or might be no prob; 
# but usually it's text/plain in emails
-   $message->attach(Type=> 'TEXT',
+   $message->attach(Type=> 'text/plain', # TEXT 
                     Data=> $text,
                     );
    $message->attach(Type=> 'text/html',
                     Data=> $html
                     );
     
    $message->send('smtp','000.000.000.000',
                     Debug=>1,Timeout=>60,Port=>26);