identifying no "From" header

Hello all,

I have a spam filter using procmail and perl implemented successfully, but  
I am having trouble with a recipe to identify email with no "From:"  
header.  Can anyone spot the problem?

I intend to dump all email with no "From:" as spam.  However, for the  
moment my recipe is supposed to simply label such messages, letting them  
pass.   It is not labeling messages containing no From: header.  The  
procmail log simply indicates that the second condition line is not  
fulfilled.

Here is the recipe (CC_ contains the previously-extracted Cc header.  WL  
is "no"):

VERBOSE=on

:0
* ! WL ?? ^^yes^^
* ^From:([ ]$|$)|!^From:|^From:.*<>
{
     WL="yes"
     :0 fwh
     | formail -I"Cc: (no from) ${CC_}"
}

VERBOSE=off

Regards,
Lloyd

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