Backscatter & challenge response

[Devon Harding]

>
>
> I can just speak for myself. But I found the following line in header
> checks took care of one of them:
> #       No dirty autoresponders
> /^X-ChoiceMail-Registration-Request/    REJECT  We are not buying into
> your ChoiceMail crap
>
> Hugo.
>

Where do you place this?  What file?  /etc/mail/access?
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