> Using the dnsbl type of test and a custom zone, you could extend this 
> through DNS.  For instance:

> MPBL-SPAMDOMAINS   dnsbl    %REVDNS%.%RHSBL%.spamdomains.example.com    
>     127.0.0.2    4    0

Interesting  idea,  Matt.  Still  way  too much management compared to
SPF-compatible    formatting,    though.   The   ability   to   append
._spf.example.com  to  SPF  queries,  or use the SPFDOMAINS text list,
would be a lot easier.

--Sandy



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Cypress Integrated Systems, Inc.
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