scott at kitterman
Nov 7, 2009, 12:33 PM
Post #4 of 4
On Sat, 7 Nov 2009 21:25:17 +0100 Wojciech Scigala <libspf2.org [at] wojtus>
>On Sat, Nov 07, 2009 at 02:55:30PM -0500, Scott Kitterman wrote:
>> I think you should take note of such domains and mark all mail from them
>> bad. This should be done at the application level, not in the library.
>> It's a good thing the spammers are telling you about a bad domain.
>Well, I don't think that's a good approach. Firstly, that would need
>a double, independent checking of SPF record (by libspf and
>application). Secondly, numbers of these domains are hard to
>estimate and maybe it would need a RBL-like solution.
>Also, keep in mind that a spammer does not need to have any access
>to the domain to abuse it's wrong SPF code.
True, but it takes DNS access to publish such a record, so that's probably
good enough for me.
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