Eric Stanley <barnabas at knicknack.net> writes:

> I really like the Sender Permitted From mechanism
> (http://spf.pobox.com).  It allows you to designate which hosts are
> permitted to send mail from domains which you control. You can also
> check incoming mail to see if the sending domain has specified SPF
> and, if so, if the mail is coming from an authorized host.
>
> It's not widely adopted yet, but if and when it is, it could put a
> big dent in spam, since most of it has forged addresses. I'm
> encouraging everyone I know to implement it.

I see it as being particularly valuable for eliminating the easy
sender forging that makes various scams work.  Often ebay, paypal, and
bank-related. 

And of course for the amusing message it gives when it detects an
improperly forged yahoo or aol HELO line!
-- 
David Dyer-Bennet, <mailto:dd-b at dd-b.net>, <http://www.dd-b.net/dd-b/>
RKBA: <http://noguns-nomoney.com> <http://www.dd-b.net/carry/>
Photos: <dd-b.lighthunters.net>  Snapshots: <www.dd-b.net/dd-b/SnapshotAlbum/>
Dragaera/Steven Brust: <http://dragaera.info/>

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