Re: [exim] Sign-key solution for backscatter-spam?

Johann Spies wrote:
> I don't want to use SPF and don't want to start a flame war on it
> (again) but I want to stop backscatter-spam.
>
> I came across a document
> (http://psg.com/%7Ebrian/software/authbounce/configure-authbounce.txt)
> using an acl: check_bounce_key to counter the problem of
> backscatter-spam.
>
> The theory makes sense to me.
> Are any of you using this technique?
> What are the pitfalls?
> Would you recommend it?
>

I think this one:
http://www.slett.net/spam-filtering-for-mx/exim-sign.html
is a safer bet, because the one you quoted requires remote MTA to comply with
some rules.
I use this technique on about 25 servers and nearly never had a problem.