Hi... I want to migrate form Debian 9 to Debian 12. Check all except Mailman3. Is there HOWTO for MM3, D12 and ISPConfig? Thanks
Mailman 3 is incompatible with Mailman 2 and ISPConfig supports Mailman 2 only. So you can not use ISPConfig with Mailman 3.
I don't know. There are no packages available for it but maybe you can compile it manually. We might support it, but we have not found a sponsor yet that will cover the costs and mailinglists are nearly not used anymore today. Supporting Mailman 3 means to do a complete implementation for mailinglist support necessary due to the incompatibility between Mailman 2 and 3.
