Re: injecting cancel control messages in moderated groups

Hi Marco,

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?

The same process applies to the injection of articles in moderated newsgroups, either they have a Control header field (like cancels), a Supersedes header field, or none of these.
Notably Section 3.5 of RFC 5537 about the duties of an injecting agent:
    7.   If the Newsgroups header contains one or more moderated groups
         and the proto-article does not contain an Approved header field,
         the injecting agent MUST either forward it to a moderator as
         specified in Section 3.5.1 or, if that is not possible, reject
         it.  This forwarding MUST be done after adding the Message-ID
         and Date headers if required, and before adding the Injection-
         Info and Injection-Date headers.
And afterwards, Section 3.9 about the duties of a moderator.

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.

I agree the news reader should not add an Approved header field to cancels it sends.
--
Julien ÉLIE
« A man who is not married is incomplete; a man who is married is
   finished. »