Re: Blocking traffic by Country to reduce spam

[Micheal Espinola Jr <michealespinola () gmail com>]

There area few different ways to approach this, each having advantages
and disadvantages:

Block/allow based on IP ranges
Block/allow based on HELO domain name
Block/allow based on sender domain name

You can also do this or supplement the above by using DNSBLs that
categorize based on country of origin.

As an emailer in the US that only communicates directly with US and UK
addresses (via a particular spam filter in question), I find this type
of blocking invaluable as a way of reducing over-all spam for certain
clients.

It not for everyone, and its not fair to everyone. But if you have
specific and clearly defined email needs, it can help tremendously.

--
ME2


On Mon, Jun 22, 2009 at 10:38 AM, <paavan.shah () gmail com> wrote:
> Hello List,
>
> One of our clients is based in USA and has most of the business in USA and UK.
>
> To reduce spam we are planning to propose them a solution to filter traffic by country.
>
> We can add IP Blocks for USA and UK as a whitelist and allow only incoming access to those IP Blocks,everything else 
> is blocked.
>
> Has anyone implemented this change on their production networks?Has it been effective to reduce spam?
>
> Please share your views and experiences
>
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