DENY+DELETE NOT WORKING

[My BSD]

Happily running MS v. 4.25-14 under Gentoo Linux.  It is really a great and
wonderful application.

Read the MS 4.24-5 Release Notes which assert:

   "Filename and Filetype allow/deny rules files now have a third option in
   addition to 'deny' and 'allow', you can now do 'deny+delete' (or any word
   containing 'deny' and 'delete'). This will stop the denied attachment
   from being quarantined."

Created a "filename.rules" file with a single entry:

deny+delete winmail.dat$        "Outlook RTF file"  "Outlook RTF file."

With a corresponding MS.conf entry:

Filename Rules = /opt/MailScanner/etc/filename.rules

Unfortunately, winmail.dat files are not deleted with this setting.

Is this setting not supposed to "delete" (strip) the attachment from the
message?

What am I missing?

Thank you!