Developers of Sympa

[Aumont <address@concealed>]

Hi

I'am working on Sympa MLM S/MIME features. Sympa already can
check S/MIME signature on messages .

Now Sympa can also receive a encrypted message sent to a list
(a list can have its own X509 certificat). In this case, Sympa
decrypts it using the list private key and then encrypts it for
each subscriber using subscriber's certificat. (subscriber's
certificat are cached by sympa when receiving a signed message).

I nedd your help to imagine what to do if Sympa do not have access to
some subscriber's certificat ? It is imposible to crypte the
message for those recipient so the message will not be distributed.

Should sympa notify the message sender ? the list owner or the
subscriber of thoses errors ?

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Serge Aumont        Comité Réseaux des Universités
                     Campus Beaulieu 
                     35042 Rennes Cedex   +33 99 84 71 47