Robert Aldwinckle wrote:
A surprise for me is that both Google Groups and
the web interface seem to have no trouble with Sam's replies.

Hints from headers?...

X-Mailer: http://www.courier-mta.org/cone/
snip
Content-Type: multipart/signed;
boundary="=_mimegpg-commodore.email-scan.com-11676-1141905612-0004";
--
~PA Bear