The upgrade to 3.0.4 seems ok. I have installed mailman with the new manuel. But I created a list before this install, on a domain. And lists on this domain are created, but there are 404 errors for interfaces http://<domain>/cgi-bin/mailman/admin/<list> http://<domain>/cgi-bin/mailman/listinfo/<domain> ispconfig "mail warnings" shows : Nov 18 13:38:02 ks356348 postfix/postmap: warning: /var/lib/mailman/data/virtual-mailman.db: duplicate entry: "<list>@<domain>" (and other aliases) /var/lib/mailman/data/aliases seems ok. But /var/lib/mailman/data/virtual-mailman has a problem : there are several lists of <domain> which are not deleted. Do you know how I can correct that ? Thanks !