dovecot sieve duplicates detection

[André Rodier]

Hello,

I have tested the sieve duplicate script with success so far, but I have
a question.

I would like to know if the "duplicate" sieve flag in Dovecot is global
to all folders, or specific to one folder only.

For instance, if I copy an email from one folder to another, and I have
a discard action on duplicate email, is this action will be applied (in
this case, discard) or not.

If the duplicate is global to all folders, is there a way to restrict
the search in one folder only.

Thanks for your help.
André