Ian Eiloart wrote:
>> Might be a way of detecting spammers who use SPF by the hosts they
>> reference in their SPF record.
>
> I guess you should reject mail from domains with +all. I'm not sure if
> Exim's SPF facilities do that.
Would be quite easy to do that using dnsdb. Especially now dnsdb is
turned on by default in 4.71
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