Split mail on two headers

[Harry Putnam <reader@newsguy.com>]

Probably should be using 'fancy-splitting' but have tried to read it
several times, and it is just to complicated for my level of
experience. (A 'correct'  way of saying: I couldn't make heads or tails
of it)


I want to see a regexp capable of splitting a message on both 'From' and
'To' headers.  In other words some way to match on more than one line.

Something like this seems it should work to split Joes' mail to me into
'Box' and let his mail to <whatever> go in a different direction, but
does not.

("Box" "From:.*Joe Blow\\(.\\|\n\\)*To:.*reader")

Either one works by itself, but not together.

Trying to tell the search engine to match "From: Joe Blow" then scan any
number of characters or newlines to match "To: <anything> reader"

Is this annotation "\n" the proper one in this instance?

Apparently this regexp engine searches like so:
         
jfjjjfjjj----------------\     "head"  
fjjfjjjf                     --all hearder lines
kfjfjjfjf                    <==Engine searches hear
kkfkfkfkf________________/

jfjfjfjfj----------------\
jfjfjfjf                     -- body 
jfjjjjj__________________/   <==not here


So can it be made to match on more than one line in the 'head'?
Or, even more complicated, can it be made to match on a string in the
body? (might be fun to play with)

-- 

Harry Putnam  reader@newsguy.com