The mailing list for listmasters using Sympa

[Brouard Nicolas <address@concealed>]

Hi,

We are using spamassassin to prevent us from some spams but concerning
our mailing lists, more and more moderators complain about moderating
spams.

Most of our lists have a 'send' parameter set to "privateoreditorkey"
which means that non subscribers can send a message to a list via a
moderator who have to reply by mail accepting or rejecting the diffusion
to the list.

We also made a "privateoreditorkeyquiet" option which does not return
any message to the non-subscribed sender concerning the moderation
unless his message is refused by the moderator.

Now I would like to add that a non-subscriber have to be authenticated
before his message is sent to the moderator. I am expecting that it will
limits the spammers (who needs to have a valid return address and are
requested to send a confirmation mail to sympa).

How can I do it?

Any better method?

We don't have usurpation of valid identities until yet, so we don't need
to authenticate messages from subscribed people.

Many thanks for any help,

Nicolas Brouard
Paris