Francis Hwang, May 8:

> Depending on what sort of hooks you have for filtering: Emails usually
> contain an In-Reply-To header, which is what mail readers use for
> threading. 

The References header is useful as well,
        nikolai

-- 
Nikolai Weibull: now available free of charge at http://bitwi.se/!
Born in Chicago, IL USA; currently residing in Gothenburg, Sweden.
main(){printf(&linux["\021%six\012\0"],(linux)["have"]+"fun"-97);}