Hey Sam (et al),

I just came across a situation where I wanted to whitelist a vendor 
(dyndns.com), so I requested their rDNS names. They cordially replied 
that they use various servers, and gave me their SPF record as 
reference. Then a little light went on. Spamdyke could do this for me.

How about a spf-whitelist option, similar to the other whitelist 
options, that would read the SPF record for the sending domain and 
automatically whitelist according to the SPF rules found. This would 
effectively say, "whitelist whatever servers are listed in the domain's 
SPF record - I'll trust their SPF record".

I know this isn't trivial because of the variety of ways that senders 
can be specified in SPF, but I think the feature would be very useful.

I would guess that most users would want to implement this only for 
certain domains. I'm not sure if turning it on globally would be ok to 
do or not. I'm thinking probably no, but it might be a nice option for some.

Thoughts?

-- 
-Eric 'shubes'

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