Toolkit
Story: Microsoft revamps Sender ID
Sigh. This won't help because things still can get spoofed and it's a far cry from preventing systems getting breached and abused as spam relay hosts.
What it will do is increase management traffic on the Internet as well as adding more public info into DNS records.
So don't be surprised if SenderID will only make things worse. Along with a little Microsoft surprise later on (there are still some unresolved issues in that area).
In all it's symptom fighting. The causes are still wide open for further exploration.
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