Wietse Venema wrote
> zen.spamhaus.org provides a service that depends the DNS client IP
> address. Low-volume DNS clients get free service, but high-volume
> DNS clients have to pay for a subscription.
> 
> For example, if you use the resolver at a big ISP, or a public
> service like 8.8.8.8 or 4.4.4.4, then zen.spamhaus.org won't work
> well for you, if at all.
> 
>       Wietse

Thank you so much once again for being of assistance. It's utmost clear now.
Much obliged.    




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