> 1) the incentive is to make sure their messages delivered. > 2) increasingly, antispam filters are taking out legitimate > communications from > businesses. The use of a stamp would allow them to bypass > the filters without > requiring the recipient to do anything special (i.e. white > list, filter exception). [I don't see the distinction between these arguments] The same argument holds for authentication based approaches that do not involve a per message charge. If C|Net has a certificate that proves that they sent an outgoing message their subscribers know it came from them and is not spam. This mail has an S/MIME signature, you can tell it came from me. Phill
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