Undisclosed recipients :; -- again

[Philip Prindeville]

Hi.

I want to block all messages that I'm getting that have:

To: undisclosed recipients: ;

with no Cc: line.

Unfortunately, the rule that I have:

header L_UNDISCLOSED            To:raw =~ /undisclosed-recipients: ?;/
describe L_UNDISCLOSED          To: list is meaningless and no Cc:
score L_UNDISCLOSED             10.0



also seems to match when there's no "To:" line at all, only a "Cc:" line
(which isn't what I want).

Why is Spamassassin thinking that there's a header 'To:' line, and it
says 'undisclosed recipients' when it doesn't exist?

This is on Fedora Core 11, updated (so SA 3.2.5, Perl 5.10.0, and
Sendmail 8.14.3)

Thanks,

-Philip