Re: injecting cancel control messages in moderated groups

Marco Moock <mm@dorfdsl.de> wrote:

Hello!
https://www.rfc-editor.org/rfc/rfc5537#section-5.3
indicates that cancels can be used to cancel messages in a moderated
group.

  Cancel control messages listing moderated newsgroups in their
  Newsgroups header field MUST contain an Approved header field like
  any other article in a moderated newsgroup.  This means that cancels
  posted to a moderated newsgroup will normally be sent to the
  moderator first for approval.  Outside of moderated newsgroups,
  cancel messages are not required to contain an Approved header field.

How is the process here?
When issuing a cancel message in a moderated group, should the NUA send
it to the group itself without an approved header?

Let's think about this.

In unmoderted Usenet, typically we think of three parties who might issue a
cancel. A first-party cancel would be issued by the author. A second-party
cancel would be issued by his News administrator. On sites that implement
it, camcel-lock authenticates first and second party cancels.

A third party cancel is issued by anybody else.

In moderated Usenet, the author's proto article isn't a Usenet article. The
author isn't the first party. The author has not posted to Usenet. There is
only one party, the moderator. If we're assuming that the author's News
site sends the cancel message to the moderator, then the proto cancel
message cannot be self-approved by the author.

PS: I currently file a bug report for Claws Mail as it includes an
Approved: header in a cancel message - for unmoderated and moderated
groups.

Perhaps a self-approved proto cancel article for a moderated newsgroup
should be rejected by the News site and not sent to the moderator, but
I have no idea how News servers are programmed.