I can tell you that there *is* a confirmation requirement before mass unsubscribing everyone, because I almost did it tonight and got a warning message. 

Risker/Anne

On Fri, 20 Jan 2023 at 23:37, Amir Sarabadani <ladsgroup@gmail.com> wrote:

FWIW, this is not the first time an admin mistakenly has done this. It is an issue in the interface that doesn't even ask for confirmation before mass unsubscribing everyone.

There was a task for it but I can't find it, if anyone remembers please send it to me.

Best

Am Sa., 21. Jan. 2023 um 05:03 Uhr schrieb Kunal Mehta <legoktm@debian.org>:

Hi,

I have reached out to the wikimania-l list admins privately with what I
found by investigating the server logs[1], it appears that the
"unsubscribe all" interface was accidentally used and then people were
silently resubscribed (so it appeared they weren't unsubscribed in the
first place).

In general, if some data loss happens please please PLEASE reach out to
the Mailman admins / SRE team as soon as possible, we have much better
tools like database backups to restore things exactly to the way they
were. Accidents happen, we understand, it's much easier for us to
intervene and reset things right after they occur rather than trying to
piece things together later.

[1] Those with Phabricator security access can review
<https://phabricator.wikimedia.org/T327572>.

HTH,
-- Kunal / Legoktm

On 1/18/23 06:07, Deryck Chan wrote:
> Hi listadmins,
>
> Many subscribers to wikimania-l received a "You have been unsubscribed
> from the Wikimania-l mailing list" email today, despite the fact that we
> are certainly still subscribed (and are discussing these false messages
> on-list).
>
> Has this happened with any other lists?
>
> --Deryck
> wikimania-l listadmin, [[User:Deryck Chan]]

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--

Amir (he/him)

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