Re: Problems using dnswl for SPF

[Alessandro Vesely <vesely@xxxxxxx>]

s/abusing/using/

I just assume people know what they look up.  If they exceed 100,000 queries
they may as well subscribe, no?

Ale

On Mon 18/Jan/2016 03:55:47 +0100 Patrick Domack wrote: 
> You are abusing other peoples dns, the list.dnswl.org to do this.
> 
> You also assume, that the other people looking up your request, don't lookup
> anything else. You are assuming your the first and only one to do this. This is
> a bad basis to use a service that you know limits the number of uses allowed,
> and depend on it to work.
> 
> 
> Quoting Alessandro Vesely <vesely@xxxxxxx>:
> 
>> Hi Matthias and all,
>>
>> SPF specs include an appendix which details how to avoid to break forwarding:
>> https://tools.ietf.org/html/rfc7208#appendix-D
>>
>> I'm trying D.1:
>>
>>    v=spf1 +ip4:my.ip.add.ress ?exists:%{ir}.list.dnswl.org -all
>>
>> but sometimes it doesn't work well.