On Fri, 2010-11-12 at 08:50 +0200, Jeremy Van Rooyen wrote:
> "Delivery Status Notification (Failure)" or "Message Undeliverable!"
> with the original email attached which is spam.

Backscatter.

Other than the SPF record, the SA VBounce plugin might also help you to
filter out the backscatter on your end immediately.


-- 
char *t="\10pse\0r\0dtu...@ghno\x4e\xc8\x79\xf4\xab\x51\x8a\x10\xf4\xf4\xc4";
main(){ char h,m=h=*t++,*x=t+2*h,c,i,l=*x,s=0; for (i=0;i<l;i++){ i%8? c<<=1:
(c=*++x); c&128 && (s+=h); if (!(h>>=1)||!t[s+h]){ putchar(t[s]);h=m;s=0; }}}

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