On Jun 8, 2014, at 10:32 PM, Brandon Long <bl...@google.com> wrote: > The message is already corrupted, or there wouldn't be a problem to be solved.
When the message arrives at the list, it's unlikely that it's already corrupted. What has been described is corrupting the From header by the same entity that is about to break the DKIM signature by altering the the message. This should be called the "break it worse" method. > I also fail to see how this is a security issue. Agreed. It's *really* easy to filter and block delivery for non-existent domains. Matt _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
