Maybe worth mentioning that if mailman isn’t available, mailman3 is (or should be), although there’s no migration path from one to the other AFAIU. The UX will be much different for users too. But the mailing lists feature isn’t vanishing completely, in principle.
Well, mailman in itself may be used by other apps, but the main point is to host mailman on a YNH instance, so as to provide mailing-list, per se. The YNH machine being able to receive and send email is then managing the lists. Mailman is integrated with postfix, etc.
Mailman2 is a deprecated software : it relies on Python 2 which reached end of life in January 2020. Mailman 2 is not being developed anymore, and wont be available on Debian Bullseye / Yunohost 11.x. You should really consider using alternative solutions.
Re Mailman 3 vs Mailman 2, the thing is that you need to plan a transition of one to the other, and I’m not sure there’s a smooth migration path, both software being merely different. I.e. backup + restore, reconfigure, etc.
Also, the user experience will be different : need to plan supporting their learning of how to reach the new location, change of habits, etc.
This appears to be a Debian 11 specific question and the incompatibility isn’t caused by yunohost. This might be the first time where I have seen a linux application which isn’t forward compatible to a future linux OS bistro. This is so strange!!! What inside of linux is stopping the app to be compatible?
Just now I tried another installation of yunohost on Raspios 64bit (beta stage testing), using the latest bullseye lite 4.4.2022 on a raspi 4b8gb and raspi 3b+
Compared to my old installation on raspi bullseye arm64 some weeks ago - which still seems to work - there is no difference.
My Primary Apps: roundcube and nextcloud
systemctl still says: rspamd.service is loaded/failed/failed (and diagnosis tells me that every day at 7AM and 7PM)
and systemctl complained formerly: email@example.com: loaded/failed/failed
what changed in the new install to: firstname.lastname@example.org: loaded/failed/failed
When you go back in the testing discussion some weeks there was a very emotional answer to a user who installed rspamd from sid, what was working for him, while the one from bullseye did not. Since then I could not find a real solution.
I think I should wait with the final installation until the two errors in systemctl are gone – right?
I wonder how will the upgrade be? We will have to first push an upgrade to Debian from 10 to 11, or is the Yunohost going to force that when we get an update for YNH 11? I have plenty of apps and I wonder if this process will be more automated or I will have to reinstall Debian 11 and then Yunohost 11 and all apps individually…