I solved my problem (after a few hours) setting in Thunderbird > Account Settings (my account) > "Junk Settings", the checkbox...
Thanks for your reply.
I'm using Dovecot 2.0.19 so i've changed the sieve_filter_1.2.master.
I've also updated this file in order to create...
I use dovecot and ISPConfig 22.214.171.124
There is a way to do the same thing using dovecot ?
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