Frank, I re-read the draft and see you're absolutely correct:

>Section 5
>
>   A Mail Receiver MUST consider an arriving message to pass the DMARC
>   test if and only if one or more of the underlying message
>   authentication mechanisms pass with proper identifier alignment.


For senders who are using a shared MTA like Postini or Microsoft
FrontBridge, should DMARC allow the option for multiple identifiers to
align?

I can think of a few ways to accommodate that:

  1. Using the p1= p2= arguments mentioned in my previous post
  2. List the technologies in a semicolon delimited parameter in the
DNS record, such as  z=spf;dkim;
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