RE: Just how many of the boxen really *need* to be in the spf rr

At 10:41 AM 3/31/2004, Seth Goodman wrote:
> I'm not up-to-date on the SPF RFC, but is this forward lookup part of the
> spec?  If not, it probably should be.  Many mail clients do this as part of
> their local IP heuristics anyway, so it wouldn't be adding overhead to any
> well-configured site.
Short answer: Yes.
http://spf.pobox.com/mechanisms.html#ptr (not the RFC, but where I saw it)
http://spf.pobox.com/spf-draft-20040209.txt section 4.6

Kelson Vibber
SpeedGate Communications <www.speed.net>