Am 30.09.2008 um 18:32 schrieb Dirk Meyer:
Why do you want to inform the receiver? He can not do anything about the problem. It is the sender who has to fix it by either re-open the e2e stream with the new client and resend the message or if that is not possible (the new client has no e2e support) it should inform the sender about the problem suggesting an insecure resend. If the user does not want to use insecure communication, the client may drop the message. Anyway, IF you want to inform the receiver, the sender could generate a new message 'e2e stream broken, message not delivered' and send it to the receiver.
With the problem that the sender doesn't always notice it, and if you know it as a receiver, you can tell the sender to please send it again.
-- Jonathan
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