I reply to myself, because I found out what was my problem :-)
It was as simple as unsetting "sort_re", and I had the threading I
liked. With "sort_re" set, the threading took into account the "Re:" part of
the Subject, which actually didn't exist :-) So, unsetting this option makes
every message with the same Subject appear in the same thread.
After knowing this, a quick folder-hook put everything just as I
wanted it to be :-)
Thanks anyway for your effort :-)
--
Roberto Suarez Soto · Sure there's no way to turn it
[EMAIL PROTECTED] · Back to the old days
Corgo/Lugo/Galicia/Spain · Of bliss and cheerful laughter