Re: [exim] How to avoid generating backscatter?

Richard.Hall wrote:
> Hello, hope someone can help with this hypothetical (at the moment)
> situation ...
>
> - spammer sends email to userA@domainA
> - domainA fails to detect that it is spam
> - userA has set up forwarding to userB@domainB
> - domainA attempts to forward email to userB@domainB
> - domainB detects that it is spam, and rejects it (5xx)
> - domainA sees 5xx, generates NDR, attempts to send it to ... oops, you
> guessed, forged sender.
>
> Is there any way for domainA to prevent the generation, or at least the
> transmission, of the NDR? (Other than improving its spam detection
> rates!!)

domainA could rewrite its forwarding MTA from the common
store-and-forward model into the nonexistent synchronous
cutthrough model.

Cheers,
Jeremy