Why is [message id] required for requests but not for other messages?

If [message id] is to be leveraged for uses other than correlation,
particularly duplicate elimination and security, wouldn't those
considerations apply at least equally well to non request/reply
interactions?  If not, what is the basis for requiring [message id] for
requests but not for other types of message?

Received on Monday, 13 June 2005 22:07:11 UTC