Comment 13 for bug 1566561

Bingo!

amavisd was clobbering the header

 how to prevent amavis from removing Authentication Results?
  https://lists.amavis.org/pipermail/amavis-users/2012-May/001527.html

Changing in python-policyd-spf/policyd-spf.conf

- Authserv_Id = mail01.example.com
+ Authserv_Id = spf.mail01.example.com

results in recv'd mail with the following header now

 Authentication-Results: spf.mail01.example.com; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=209.85.220.65; helo=mail-pa0-f65.google.com; <email address hidden>; <email address hidden>)

So, policyd-spd + python3 + Header_Type=AR now working great.

Thanks!