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Re: DNS{B,W}Ls and blocking (was Re: DNSWL will be disabled by default as of tomorrow)
From: Axb <axb.lists_at_nospam>Date: Tue Dec 13 2011 - 14:28:30 GMT
To: users@spamassassin.apache.org
On 2011-12-13 15:21, David F. Skoll wrote:
> I think we need an informational RFC that specifies best-practices for
> a DNS{B,W}L to inform clients that they have been blocked.
>
> For example, a testpoint like:
>
> blocked.dnsbl.example.org
>
> could return an A record for name servers that are blocked and NXDOMAIN
> for others. This might even work out-of-the-box for some existing lists
> that return an A record for any query (or it may not, if they expect
> a reverse-dotted-quad.)
>
> It could even return a TXT record giving the reason for the block.
>
> Anyway, assuming this idea is widely-accepted (hahaha!), it would be pretty
> easy to make something that periodically tests your list of DNSBLs and
> disables those that are blocking your query.
there is a BCP for BLs floating around which addresses some if not all
of this... MAAWF, RFC.. not sure which