[Replying to several posts]
Has anyone really looked in to this and found anything useful out?
Yes; I've been working with SPF for close to a year now. Declude JunkMail was the first commercial product to support SPF.
But if you think about someone offering dialup, and they have users sending email with the from address as a personally registered domain rather than the ISPs through the ISP mail server it would stop working.
That would *not* be a problem -- that's the beauty of SPF. Since that dialup user with their personally registered domain can choose how to handle the SPF records for that domain, they can just add an SPF record that has something like "mx:his_isp.com". Then all his E-mail will pass SPF (assuming he sends it through the ISP's mailserver, and the mailserver's IP is in the MX record -- if not, it could take slightly more work).
> Are many people picking this up and implementing it? According to the web site they've only got ~6000 registrations,
> which is not exactly a lot when you consider the size of the internet.
I believe that's actually 60,000. What many people don't realize is that SPF doesn't require registration. So that means that 60,000 domains are known to have SPF records, but there are probably somewhere around 10 times as many, since most people don't bother (or know how) to register. So that's probably around 500,000 domains with SPF records.
> And if I use the name servers provided by, say GoDaddy.com, just how do I set
> up SPF records?
The same way you would with any other DNS server or DNS hosting company. SPF just requires TXT records, which DNS has used since the late 1980s. Most DNS hosting companies allow you to create TXT records. If they do not, you can ask them -- they may be able to set them up for you by request (that was the case with a DNS hosting company we used).
> IMHO that SPF is not really going to go very far as long as the name servers > operated by most of the domain name registrars do not implement it, or even > have a methodology for adding it to name services for their clients.
It sounds like you don't know much about SPF or DNS hosting companies. A year ago, a lot of DNS hosting companies supported TXT records. Today, almost all do. Those that do not are losing a lot of customers, mainly because of SPF.
> Currently none of the registrars have a provision for adding SPF records.
Sorry, but that is 100% inaccurate.
Remember, DNS hosting companies do NOT have to support SPF (which came into being about a year ago)! All they need to support is TXT records (which have been around for over 15 years).
> I rather imagine that the implementation thus far has been for those who...
You're welcome to guess all you like. <G>
-Scott
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