Re: gnus-summary-cancel-article

[Tassilo Horn <tsdh@gnu.org>]

Emanuel Berg <embe8573@student.uu.se> writes:

Hi Emanuel,

> I accidentally sent a post three times to gnu.emacs.help - sorry
> about that, but perhaps it wasn't so grave a mistake because some
> lists/groups and/or clients (?) discard duplicate messages as
> flood/spam protection - anyway, I tried
>
> gnus-summary-cancel-article
>
> but it said
>
> Couldn't send message via news: 441 Invalid Control Message
>
> My question - is this anything that works anymore or is it a
> wasted effort, perhaps especially for the list/group hybrids?

,----[ (info "(gnus)Canceling and Superseding") ]
| Have you ever written something, and then decided that you really,
| really, really wish you hadn’t posted that?
| 
|    Well, you can’t cancel mail, but you can cancel posts.
| 
|    Find the article you wish to cancel (you can only cancel your own
| articles, so don’t try any funny stuff).  Then press ‘C’ or ‘S c’
| (‘gnus-summary-cancel-article’).  Your article will be canceled—machines
| all over the world will be deleting your article.  This command uses the
| process/prefix convention (*note Process/Prefix::).
| 
|    Be aware, however, that not all sites honor cancels, so your article
| may live on here and there, while most sites will delete the article in
| question.
`----

So probably your news server doesn't honor cancels.  I remember that
some time ago, I did cancel an article of mine at our local news server,
so it should work in certain cases.

Bye,
Tassilo