Re: [exim] Greylistd

On Thu, Nov 30, 2006, Marc Perkel wrote:

>>> Keep in mind that there *are* sites out there that:

>>> - Dont ever retry at all
>>> - Retry only once after one hour
>>> - Retry once only every 24 hours
>>> - Treat temporary errors as failures
>>> - etc.
>> I recently encountered one ISP which retries in fifteen minute intervals,
>> but only three times, before it gives up. Wackos.

> And therein lies the rub. I think the solution is to apply greylisting
> selectively rather that to everyone. Suppose that you only applied
> greylisting to hosts that:

[...]
> In home/dynamic IP ranges
[...]

I'm curious about this one particular item. Isn't it correct to always
block dynamic IP ranges? There's nothing but spam from them. I assume
that every non-spam-sender has a static IP range.