configuration via email

[Thierry Almy <lists@xxxxxxx>]

I'm trying to figure out how to configure PO via email.
I can create new accounts but I can't delete them with an email form.

My form looks as the follows ...

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Postmaster-Password: [*****]  (REQUIRED FOR THE FORM TO BE ACCEPTED)

Reply to this form, placing the desired information between square brackets.
For help with individual fields, see the descriptions following the form.

  Example Field Name:    [Entries belong in brackets]  (Hints appear here)

===== GENERAL ACCOUNT INFORMATION =========================================

  User's-Real-Name:      [Delete]  (Jane Q. Smith)

  Mail-Account-Password: [123456]
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The manual says that replacing the users Fullname with "Delete" will 
delete the account (In version 2)

Sending this form will return the error:

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The form was returned because:
Missing Range Error - Field: Accounts/DeleteUnknown
Please make corrections and re-submit the form.
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Is this command not supported anymore? Who can help?

Thierry