>I did that before. Now, with the recent Outlook installation I have, everytime I send an email from wwipstuff that contains an attachment, Outlook reports "This HTML message contains script, which the Outlook preview pane cannot display."
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>However, when I send the same zip file from Outlook, it works.

Ok, I found the reason. It turned out that the path of the file being sent was pointing to another server instead of the proper server. So, the SMTP processed the mail as is with a wrong path reference for the attachment. This surprises me. In such a case, no attachment should be attached to the email being sent.