[Mailman-Users] Empty Cc header

[Morgan Fletcher]

I recently made the upgrade* from 2.0.8 to 2.1.5. It went well. Thank you,
mailman maintainers, for a great piece of software.

Mail to our mailing lists has had empty Cc headers since the upgrade. Why
is that? It's causing some mail to be rejected by our subscribers' MTAs,
like so:

>>>>
Aug  4 07:21:17 flip postfix/cleanup[8936]: C92834800B9A: reject: header Cc:
[...] Message content rejected
<<<<

We're running postfix 2.0.18, mailman 2.1.5, netbsd.

I've searched the archives, but since "cc" is ignored by the search engine
I didn't find anything. Is this some optional feature in mailman?

Morgan

* I'd posted here previously about the trouble I had, upgrading. Adding the
  note about undoing the coerce-to-plaintext patch to UPGRADING in 2.1.5
  got me past the problem. Thanks again.