SPF = Sender Policy Framework - It's a DNS record to allow SMTP receivers to verify email envelope sender address (preventing domain spoofing and phishing), and can distinguish legitimate mail from spam before any message data is transmitted.
If you check out your domain at dnsreport.com, you'll probably see a warning that your domain needs to have one in place by Octber 1, 2004.
Microsoft - being Microsoft - wanted to do something different called Sender-ID - aka "Caller ID For Email"s. Apparently someone got to them because they decided to work with the SPF folk (pobox.com) to implement the functionality.
Bottom line is that MS will implement it for Hotmail within the next 30-60 days and I'm trying to figure out If I'll be able to send to Hotmail accounts if I don't have an SPF record in the domain DNS.
I've been told that many hosts will implement the check in such a fashion that If an incoming email fails the SPF check, it'll be passed to a blacklist checker and only be delivered if it passes that (like it works now). But I haven't been able to find anything saying that's the process Hotmail will use.
Also trying to figure out what this means for the iis smtp server set-up on my local pc.
If anyone has any info about the details behind the Hotmail or local iis smtp server setup, could you please post the info and/or links?
Thanks
EDIT: SPF Guidelines/wizard at http://spf.pobox.com
Edited by dpyers
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