As I remember, this is supposed to be a complete recipe; so where is the closing parenthesis for
9876543210^0 ^^(.+$)*Subject:[ ]*____(____([(<]no(ne| subject\
the marked left paren supposed to go?
I think it matches the right paren marked here:
$(.+$)*(^[ ]*)+____)____?(archives?:?([ ]|$)|\
Here's a structured view of that RE, where I've replaced literal parens and angle brackets with X:
(.+$)*Subject:[ ]* ( ([XX]no(ne| subject( (Xfile transmission|given))?)[XX])?$ (.+$)* (^[ ]*)+ )? ( archives?:?([ ]|$)| ((send|get)(me)?|gimme|retrieve|mail|ls|dir(ectory)?|list|show|search|[fe]?grep|find|maxfiles|version) ([ ]+[^ ]*)?$ )
-cary