[Spambayes] loosen up address_headers option?

[Justin Mason]

Skip Montanaro said:
> As spambayes moves out of the experimental stage, perhaps it's worth looking
> at adding to and cc (and maybe reply-to and sender) to the default list of
> analyzed headers.

FWIW, I certainly found they had useful clues in SpamAssassin testing,
Reply-To, To, and Cc at least.  Sender, however, was just noise.  A look
at the SpamAssassin-devel archives may dig up the test results in
question...

--j.