Bounce messages - Announcement list

[vrautenbach]

After sending a email to the announcement mailing list. I received a large amount of bounced messages linked to various subscribers. Below is an example of the emails received:

This is a Mailman mailing list bounce action notice:

List: Announce Member: Subscribers email Action: Subscription disabled. Reason: Excessive or fatal bounces.

The triggering bounce notice is attached below.

[neteler]

Can you please check if a yahoo.com email is involved? (they may trigger these "bounce storms")

[vrautenbach]

I check now, there weren’t any yahoo emails. It was quite a range from usgs to gmails. Let me know if I can give any more information.

Thank you the assistance.

[neteler]

(somewhat related: ticket:2475#comment:21 etc.)

[cvvergara]

I could subscribe

[cvvergara]

I don't think I really solved the problem. But a testing message from me has arrived to the mailing list

​https://lists.osgeo.org/pipermail/announce/2020-December/000522.html

Up to now I have not received bounced messages. Maybe only administrators receive the bouncing messages. @vrautenbach Please report

[vrautenbach]

I think it is only the administrators that receive the bounce emails. But the mass unsubscribe and bounce emails (over 50) happend when I posted an email to the list.

Should I add the emails removed during the bounce storm and post a new email to the list to test if it happens again?

[cvvergara]

Setps:

• make a backup of currently registred subscriptions (Vicky)
• Send a test mail (Victoria)
• See if more unsubscriptions occur (Victoria)

if they do not occur, then add the missing unsubscribed if more un-subscriptions occur the restore the backup

[cvvergara]

made a backup of subscribers: regular and digest subscribers

/usr/lib/mailman/bin/list_members -r announce > announce-regular-dec04.txt
/usr/lib/mailman/bin/list_members -d announce > announce-digest-dec04.txt

[neteler]

To check the current bounce states, you may

• activate in the mailman list settings that you (list admin) want to be notified by email
• check on the server:

  root@osgeo6:~# cat /var/log/mailman/bounce
  

Hint: To reset all bounce levels for all lists and members, run

root@osgeo6:~# withlist -a -r reset_bounce --   ## reset all mailman bounce levels

[vrautenbach]

Good day All

This was recently again an issue. We had over 120 emails that bounced. This occurred on 29 April. Is there anything from a user side that we can do?

I checked now all these subscribers with bounced emails in this round is still subscribed, but if I check some of the previous bounced mails (from 6 months ago), those subscribes are not listed as members of the mailing list anymore, did the system remove them?

Regards Victoria

[neteler]

Replying to vrautenbach:

Good day All

This was recently again an issue. We had over 120 emails that bounced. This occurred on 29 April. Is there anything from a user side that we can do?

We need to check once more if our list server complies with the continuously changing email requirements/security measures.

I checked now all these subscribers with bounced emails in this round is still subscribed, but if I check some of the previous bounced mails (from 6 months ago), those subscribes are not listed as members of the mailing list anymore, did the system remove them?

I am afraid yes, see also my comment here: ​https://trac.osgeo.org/osgeo/ticket/2475#comment:15

[robe]

Since we've upgraded the server, which upgrades postfix, I'm hoping that fixed whatever this issues is. Is this still happening?

[cvvergara]

Not happening for a while so its sorted out.