[afrinic-anti-spam-discuss] DNS whitelisting

[Hari Kurup]

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Graham Beneke wrote:

Hi Graham,

> The whitelist currently contains most of the major mail servers in South
> Africa as well as a number of smaller servers from around SA and the
> rest of the continent. 

Maybe I don't fully understand it quite well. What criteria did the
"major mail servers" pass in order to have the privilege of being on
your whitelist?
Blacklisting uses exclusion (based on spam reports, etc.) while
whitelisting uses inclusion based on what exactly?

- --
Hari
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