Backscatter & challenge response

[Devon Harding]

>
>
> > | I've been looking at a selection I've been sent through this
> > morning and | there doesn't seem to be anything consistent about them
> > and there not | hitting many spamassasin rules.
> >
> > I considere them hostile spam senders and blacklist them accordingly.
>
> I agree totally. I bounce any mail from a known 'challenge response'
> user. The entire concept of 'challenge response' is flawed and a huge
> waste of time and bandwidth.
>
>
> --


What has everyone been doing to stop these?
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