Regularly users on the talk-fr mailing list get kicked off. It's my 
third time this month! Whenever it happens it looks like multiple users 
across multiple ISPs get kicked off at the same time.

The notification message mentions "excessive bounces" without specifying 
how many bounces occurred or providing any information that would help 
diagnose the reason for the bounces. Most users rely on their ISP email 
servers and thus cannot look at the server logs either.

Here's the relevant extract of this message (without the link and 
password):

----
Votre abonnement à la liste Talk-fr a été désactivé suite à due to 
excessive bounces The last bounce received from you was dated 
21-Dec-2019. Vous ne recevrez plus de messages en provenance de cette 
liste tant que vous n'aurez pas ré-activé votre abonnement. Vous 
recevrez encore 3 rappels comme celui-ci avant que votre abonnement ne 
soit supprimé.

Pour ré-activer votre abonnement, vous pouvez répondre simplement à ce 
message (en laissant la ligne Subject: --Objet-- du message intact) ou 
vous rendre à la page de confirmation à l'adresse :

---


Debian also has to deal with bounces on their mailing lists and there 
are two things that they do which improve the situation greatly:

1. The notification email contains a link to the last bounce 
   including all the email headers (see attachment).
   - This helps get a sense of why the bounce occurred.
   - Most of the time it's a spam false positive. Note that most users 
     cannot prevent their ISPs from doing at least some level of spam 
     filtering.
   - Users can however report false positives to their ISPs, but only if 
     they can provide the full email headers of the message that 
     bounced. The link in the notification message provides that 
     information and thus there is at least a chance that ISPs can 
     improve.
   - The link remains valid for about a week. This way the Debian 
     servers don't end with a glut of bounced emails.

2. A user gets kicked out only if more than 80% of the emails got 
   bounced over a period of 7 days. Notification emails get sent at a 
   much lower threshold (I presume weekly in the presence of bounces). 
   This still lets Debian purge old accounts from their mailing lists 
   without randomly kicking users out.


So it would be great if OSM could implement a similar policy on Talk-fr 
(and the other mailing lists at your discretion).


-- 
Francois Gouget <[email protected]>              http://fgouget.free.fr/
                  Hiroshima '45 - Czernobyl '86 - Windows '95
Dear subscriber,

We've encountered some problems while sending listmail to your
emailaddress [email protected].

In the last seven days we've seen bounces for the following list:
* debian-devel
        4 bounces out of 100 mails in 7 days (4%, kick-score is 80%)
        (https://lists.debian.org/bounces/MmmPJ+ZGdBf5lA6SgIyEGA)

(The link above points to a copy of the latest bounce
and will be valid for seven days.)

If the bounce-rate passes the kick-score, our bounce-detection will forcibly
remove your subscription.

Bounces happen from time to time when spam slips through our filters but are
rejected by your mail provider.  If you are your own mail provider and use
'Before-Queue Content filtering', you should whitelist bendel.debian.org from
Content filtering.

However: You can safely ignore this message (and you will not be unsubscribed
:-) ) if your bounce rate remains low.

For more information see https://wiki.debian.org/Teams/ListMaster/FAQ

You are welcome to contact [email protected] if you think this
message was sent in error.

        Sincerely,
The Listmaster Team
-- 
http://lists.debian.org

_______________________________________________
Talk-fr mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/talk-fr

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