Notes/Domino 6 and 7 Forum : Attachment not shown (MIME)

I have a problem, where attachments of a certain kind, when received from a standard Mail User Agent ( Outlook, Mozilla) dont show up in the notes mail-template as an attachment. Instead, the attachment is displayed inline, and no little paper-clip is shown.

This happens mostly when I send simple types, such as XML files.

The same mail sent from a Notes MUA does not show this behavior, and the attachment is shown just fine.

My problem is, that I need to detach the attachment by its name from the C++ api, and are not allowed to install agents and suchlike on the customers notes system. To me, it must be just another mailsystem from which to obtain mails.

Weirdest thing is: In the Mozilla/Outlook mails, the $FILE variable is set with all the information about the attachment, but the AttachmentNames array is completely empty. I have checked that the userprefs in the addressbook is set to "Keep senders format".

I double checked on a Notes 5 mail template, and this actually showed the paperclip in the overview, but did not show the attachment as something detachable in the main view.

What can I do ? I really need to be able to send a mail with an xml-file attachment to notes from ANY MUA and be able to retrieve it again. Why is the attachment not shown in the attachmentNames array when it is an xml file, but is there just fine when its a zip file ?

I have observed this on 3 or 4 different locations, so I do not think it is just me being bad at configuring my notes :)