[Important] New behavior for spam handling on this list

[Jean-Marc Lasgouttes]

Dear all,

Until now, the handling of the list was like: messages from subscribers 
go through, other messages get discarded.

There is actually a way to filter e-mails marked as spam, and I have 
already changed all our other lists to take advantage of this information.

Today it is lyx-users' turn. The new behavior is:
* spams are automatically discarded; please notify the list if a message 
of yours just disappears. It seems to work correctly on the other lists 
that we have;
* members posts not qualified as spam go through as usual;
* remaining non-member posts are held for moderation.

The big advantage is that now non-subscribers will be able to post 
messages (with a low amount of manual moderation from my side).

Comments welcome.

JMarc