I tried to do a similar Mailman 2 -> 3 upgrade and ended up rolling back to Mailman 2 even though it is unsupported.

Mailman 3 has much higher minimum memory requirements than Mailman 2. If the server is memory bound you might run into some trouble.

Cheers,

Pete

On Sun, 17 Jan 2021 at 04:03, Jason White via luv-main <luv-main@luv.asn.au> wrote:

On 1/16/21 6:59 AM, Russell Coker via luv-main wrote:
> We currently run Mailman 2 which is not supported in Debian/Bullseye which
> will freeze soon. So upgrading will force an upgrade to Mailman 3 (which is a
> good thing anyway), above are the upgrade docs. One thing to note is that
> URLs for archives will change, is this a problem?
I don't recall messages on the list (at least recently) that contain
links to messages in the archives. So, it probably isn't a problem, as I
doubt it will result in broken links.

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