How to authorize non subscriber to post a message to a non public list ?
If there is few concerned people, you can add configure the list as private, add them to list with subscription option “nomail”. In many cases this solution is not efficient. The best solution is to create a new scenario that will authorize some non subscriber. Thsi scenario can use LDAP filter, regexp on user email, etc The most esay thing you can do is to base authorization on subscription to some other list. This way you can control who can send message to list foo managing subscribers of list foo-authorization.
