Re: homework, not an experiment, draft-crocker-email-deliveredto

On 8/2/2021 7:25 PM, Viktor Dukhovni wrote:
> Some abuse of Delivered-To to trigger bounces has been reported now and
> then,

The thread you cited only describes the abuse as:

>>  If mail arrives for a recipient
>> that is already listed in a Delivered-To: header, the mes-
>> sage is bounced.


Viktor,

I'm not understanding.

Since Delivered-To is meant as an indication about the message
containing the Delivered-To, I'm not understanding what the 'already
listed' reference means.

It seems odd that a spammer would send a message designed to be 
rejected, other perhaps for generating problematic bounces.

To the extent the description is meant to refer to a broader set of 
mechanisms and activities, can you elaborate?

d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net