> [From: changing] 
  You can blame me for the change to the way the From:
header is
 handled.  The purpose of this change is to try to solve the mass
 bounce problem. 
Sounds as though this may be a cure worse than the disease, though.
  Actually, you should really blame the folks
responsible for DKIM,
 SPF, ADSP, and the like. 
Depending on what you mean by "responsible", I might disagree.  I don't
blame the people who designed them.  Depending on details I don't know,
I blame either the people who adopted them without due consideration
for their side effects or the people who chose a provider configured
inappropriately for their desired use.  (My guess from the outside is
that the former is closer to appropriate here.)
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