[Asrg] Email Postage (was Re: FeedBack loops)

[David Nicol]

On Mon, Nov 17, 2008 at 4:49 PM, Rich Kulawiec <rsk at gsp.org> wrote:
> On Mon, Nov 17, 2008 at 03:57:33PM -0500, Barry Shein wrote:
>> Ya know, if confirmation from ISPs message queueing systems could just
>> ripple back to the end-user a message like:

time-warner does this currently.  Outbound to :25 is blocked on
residential service, and their smarthost will only accept so many
messages from one IP before 4xxing them with an informative message
stating the policy.