Eugene Smiley on 21 Mar 2004 23:20:02 -0000


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Re: [PLUG] Re: SPF


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Jeff McAdams wrote:
> Now, maybe its reasonable to say that SPF is a good idea, *if* used
> in conjunction with SMTP AUTH, to allow relaying to authenticated
> senders. But I can't say that SPF is a good system to implement as
> a blanket statement.

- From http://spf.pobox.com/intro.html:

What SPF Is Not
* SPF is not the Final Ultimate Solution to the Spam Problem. Nor
is it meant to be. Its goal is to stop forgery, not to stop spam.
* SPF is not a magic bullet that will end all spam as we know it.
It's still worth a shot; what do we have to lose?
* SPF does not mean that SPF adopters will suddenly start
rejecting mail from you.
[...]
* SPF is not for pessimists who think that no technical solution
can ever end spam.
* SPF will not solve the spam problem all by itself. It will solve
it in connection with things like RHSBLs.
* SPF is not a perfect solution that will make 100% of all spam go
away forever. I'd be quite happy with 98%.
* By default, SPF does not verify individual sender usernames; it
only validates the domain name. Per-user validation is possible with a
bit of tweaking.

In other words, it's only meant to be a small piece of an overall spam
reduction strategy...

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