However SRS only works on the envelope sender NOT the from address in the headers. So if SA does SPF on the From header it's going to break forwarding and mail redirection.... even if you are using the SPF methodology of forwarding (SRS).
No, the From line listed in the example *is* the envelope sender. Headers from this list look like:
From [EMAIL PROTECTED] Received: from mail.apache.org (daedalus.apache.org [208.185.179.12]) ... From: "Nick Fisher" <[EMAIL PROTECTED]>
The first From line may show up as Return-Path or not at all in your mail client, but it's there at the point SA is called by procmail, milters, etc.
If anyone would like to read their plan and tell me why it's not better than SPF I would love to hear the argument. You can find the details here: http://www.microsoft.com/mscorp/twc/privacy/spam_callerID.mspx
It's patented. IANAL, so I don't know what to look for to figure out whether it would be legal to write a GPL/BSD/Artistic/whatever-licensed implementation of the scheme. I'll leave that to those more versed in legalese.
Kelson Vibber
SpeedGate Communications <www.speed.net>
