Hitashi mancho via Mailman-users writes:

I have migrated around 300 mailing lists from Mailman 2 to Mailman 3. In most of the mailing lists we have configured "max_days_to_hold" to 2. It was working fine in Mailman 2. However, it is not working in Mailman 3.

This doesn't seem to be exposed in Postorius. It's not all that old in Mailman 3 (April 2020) so it's possible that it is not moved from Mailman 2 to Mailman 3 by the migration scripts.

You can use "mailman withlist" to access that variable: Use "mailman withlist -l LIST@DOMAIN.TLD", then at the prompt:

...

...

m.max_days_to_hold

to examine the value for LIST@DOMAIN.TLD.

To do a mass change, something like

for ml in mailman lists; do mailman withlist -l $ml -r fix_mdth done

where you put in Mailman's bin directory the file 'fix_mdth.py' containing

def fix_mdth(ml): ml.max_days_to_hold = 2 commit()

Of course if there are list where you want a longer or indefinite hold you'll need to change those back, since this approach changes all of them.

You can get more information with "mailman withlist --detail".

-- GNU Mailman consultant (installation, migration, customization) Sirus Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan