The original SPF that most of us read a bunch of years ago stated that a record starting with "v=spf1" should apply to the SMTP MAIL FROM.

SenderID says a record starting with "v=spf1" applies to both MAIL FROM and the "Purported Responsible Address," which is dervied from message headers via a specific algorithm.

The current "Classic SPF" spec says that "v=spf1" applies to both MAIL FROM and to HELO or EHLO.

I was poking around a bit, and noticed that Microsoft still isn't publishing SenderID pra records anywhere -- not for hotmail.com or msn.com (which I set up while I was there), but also not for microsoft.com or exchange.microsoft.com.

This seems...ironic, don't you think?

It is with mixed feelings that I announce that I will be leaving Microsoft later this month, after three and a half years.

Almost everything that you would've contacted me about in the past can now be handled by the GEST team via nocmail@microsoft.com. They will escalate internally as required (just as I did) to get you the best information.

It has been a pleasure working with you on behalf of MSN Hotmail, and I'm sure we'll be in touch once I'm settled into my next job in the industry.