Thanks a lot for all your valuable help!

I've followed the guide at <https://docs.mailman3.org/en/latest/install/virtualenv.html>

I need to run mailman 2 and mailman 3 in parallel until I've migrated all lists, on several domains.

I created the file /etc/httpd/conf.d/mailman3.conf with the content

<VirtualHost *:80> ErrorLog logs/mailman3-error_log CustomLog logs/mailman3-access_log common

  RewriteEngine        on
  RewriteCond %{HTTPS}        off [NC]
  RewriteRule ^/mailman3(/.*)  https://%{HTTP_HOST}/mailman3$1 [L,R=permanent]

</VirtualHost>

<VirtualHost *:443> ErrorLog logs/mailman3-error_log CustomLog logs/mailman3-access_log common include conf.d/certref.inc SSLEngine on </VirtualHost>

<location /mailman3> ProxyPass http://localhost:8000 </location>

The idea is to prepare mailman3 for several virtual domains.

When I connect to lamasti.net/mailman3, the title is example.com. How can I change that?

Thanks Lars