Re: Policy for posts from non-members

[Valentin Petzel]

Hi Jean,
I still think it would be a good idea to reword

https://lilypond.org/contact.html

to make it clear that subscription is wanted.

Cheers,
Valentin

Am Mittwoch, 22. Februar 2023, 23:24:18 CET schrieb Jean Abou Samra:
> Le mardi 21 février 2023 à 23:36 +0100, Jean Abou Samra a écrit :
> > Hi,
> > I've not been an admin of this list for very long, yet I'm already weary
> > of telling people who post without being subscribed to the list that they
> > should subscribe in order to avoid each of their messages being manually
> > approved. I wonder what you (meaning everyone, but especially Mark, the
> > other admin) would think about changing the list configuration to reject
> > post from non-members instead of holding them on moderation, with a
> > message such as “Welcome to the lilypond-user mailing list. We apologize,
> > but in order to prevent spam, we need you to subscribe to the list before
> > you post. Please fill out the subscription form on
> > [https://lists.gnu.org/mailman/listinfo/lilypond-user](https://lists.gnu.
> > org/mailman/listinfo/lilypond-user). Once you are subscribed, you will
> > receive all posts to the list, so you can help out other people as well.
> > However, if you only wish to interact with this list infrequently, you
> > may disable mail subscription in your membership preferences after you
> > have subscribed. If you believe you are already subscribed to the list,
> > it probably means that you accidentally posted from a different email
> > address than the one you are subscribed with. If you have any question or
> > encounter problems, feel free to contact the list admins at
> > lilypond-user-owner@gnu.org” On the plus side, this means that instead of
> > delaying the message until Mark or me looks at it, the feedback will come
> > instantly.
> An update on this:
> 
> It turned out to be a really bad idea. Fortunately, Bob Proulx, an admin
> on GNU's Mailman server, noticed the change and explained why.
> 
> The problem is
> [backscatter](https://en.wikipedia.org/wiki/Backscatter_(email)). If a
> spammer sends a spam while making it look like
> it comes from a real address that is not subscribed to the list,
> the person this real address belongs to receives an automated
> message from the list, which is viewed as unsolicited. Not only is that bad
> for this person, but it leads to DNS blacklisting for lists.gnu.org,
> which affects all GNU lists badly.
> 
> I apologize for this; I didn't realize this implication at all.
> The change has been rolled back and things will just remain as they
> were before. Thank you Bob!
> 
> Jean

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