[ic] pgp attachments have .dat extenstion

[John1]

I am using the following from the Foundation demo to send the credit card
number as an attachment:

[tag op=mime interpolate=1  type=application/pgp-encrypted
description="CreditCard_[value mv_order_number].pgp"]
[value mv_credit_card_info]
[/tag]

However, this attaches the file with a .dat extension tacked on the end e.g.
CreditCard_TEST123.pgp.dat


If I look at the e-mail source, the MIME header is:

Content-Type: application/pgp-encrypted
Content-ID: <some_id_text>
Content-Disposition: inline
Content-Description: CreditCard_TEST123.pgp

This results in an attachment with the name CreditCard_TEST123.pgp.dat (at
least this is the case when read in Outlook Express 6).


Wheras if I just send the attachment from my mail reader, the MIME header
is:

Content-Type: application/octet-stream; name="CreditCard_TEST123.pgp"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="CreditCard_TEST123.pgp"

This time the attachment arrives with the correct name
CreditCard_TEST123.pgp

How do I use the [tag op=mime] to attach the correct headers so that I get a
.pgp ending and not .dat?

Any help would be greatly appreciated.  Thanks.