I actually do use all those things, Its just all part of a larger mod_perl script and it isn't as easy to make workable snippet out of.

But if that would do it, here it is... I have the same exact problem when I run the below, whenever I try to set the type as I go, it fails with that "no data in this part". If I set the type to "multipart/alternative" when I create "my $message...." it works (but I don't get the attachment if there is one because it doesn't get switched to multipart/mixed)

#!/usr/bin/perl -w
######################################################################
# Libraries
# ---------
use strict;
use warnings; 
use diagnostics;
use MIME::Lite;
use Email::Valid;

        # If we have a valid email address.
    my $to_email = 'youremail@somedomain.com';
    my $email_valid = Email::Valid->new(mxcheck    =>    1,tldcheck   
+ =>    1);
    if ($email_valid->address($to_email)) {
        # Everything looks good, make up our message
        my $message = MIME::Lite->build (
            From    =>    $to_email,
            To        =>    $to_email,
            Subject    =>    'This is the subject',
            #Type    =>    'multipart/alternative' If I default to thi
+s then it never gets updated with a attachment.
        );
        # Did we get a attachment?
        my $attachment = '/tmp/38293132401.pdf';
        if (-e $attachment) {
            #$message->replace(Type    =>    ''); # Tried this
            #$message->replace(Type    =>    'multipart/mixed'); # Tri
+ed this
            $message->add(Type    =>    'multipart/mixed');
            $message->attach(
                Type         => 'AUTO',
                Path         => $attachment,
                Filename    =>    '38293132401.pdf',
                Disposition => 'attachment'
            );
        } else {
            $message->add(Type    =>    'multipart/alternative');
        }
        my $text_email = 'yadda yadda yadda';
        my $html_email = '<em>yadda</em> <strong>yadda</strong> <u>yad
+da</u>';
        # Do up the message                            
        $message->attach(Type    => 'TEXT',
                        Data    => $text_email
                        );
        $message->attach(Type    =>    'text/html',
                        Data    =>    $html_email
                        );
        $message->send('smtp','###.###.###.###',Debug=>1,Timeout=>60,P
+ort=>26);
    }
[download]