Kevin Peuhkurinen wrote:
Yes. Although Microsoft has refused to disclose what they have actually applied for patents on, their license only applies to specific parts of Sender-ID, which seems to imply that they did not apply for patents on SPF itself. In any case, it is certainly seems safe to continue using SPF for now.
Considering that they don't *own* SPF, it'd be interesting if they tried to patent it. SPF was created by the CTO (?) (I think CTO) at POBox.com.
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