Hi, After a request https://savannah.gnu.org/support/index.php?105812 I investigated the bug-gnucomm list.
I typed a wrong command and removed both the list configuration and the backup I had made of it. It is possible for you to recover /var/mailman/lists/bug-gnucomm from the latest backup? Thanks. Meanwhile I recreated the list so that mail is not rejected. -- Sylvain