On 27 aug 2007, at 18.55, Per Jessen wrote:
From a professional standpoint, it's not (yet) particularly useful.
Domains that publish an SPF record are still very rare (around here).
The number of domains publishing SPF records have nothing to do with
how useful it is. The number of servers checking and respecting these
SPF records is what matters.
The beauty of SPF is of course that it is a _sender_ policy. The
owner of the sending domain declares how they want you to treat
messages claiming to originate from their domain. I don't see why you
should ever feel the need to question or disregard that declaration.
j o a r
