I can reproduce a problem where inline attachments, sent from Netscape Mail users, are beeing ignored.
Steps to reproduce:
a) Create a rule that performs on attachment names. In this example, use a rule for .doc files.
b) Read Lotus Technote 4004046 on how to resend a previously dumped SMTP session. Get the SendFiles tool from IBM.
c) download this dumped SMTP session: ( * link no longer available * )
d) send that tmp file to your server using SendFiles.