regexp matching question

[Peter]

Hi all

I need to match email messages using regexec(3). I would like to match 
as much as possible in a piece, i.e. the interesting headers and the 
body (which could be large). Can this be done and is it economical 
(speedwise) to use a single hairy regexp to match the whole message or 
is it better to match the message and then parse it ? formail already 
does this somehow (I have not looked yet).

Peter
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