On Nov 19, 2003, at 4:27 PM, Roy Badami wrote:
However, that is an argument against looking up in _spf.domain, since
this domain will generally not exist, and lookups will generally be
negatively cached for much shorter periods of time than successful
lookups.
I haven't been following this too closely, so maybe I'm missing
something. But:
A "txt" lookup will generally be a miss as well and thus negatively
cached so I don't think your argument is valid.
- ask (who definitely prefers _spf.domain)
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