E’ possibile Bloccare in entrata degli indirizzi Mail che non si desidera più ricevere?
Right-Click the email, click “Move to Junk”, select your blacklist choice.
This creates a RULE called BLACKLIST… manage the Blacklist there.
Hotmail (Outlook) and I believe Gmail allow you to do this via the web interface.
https://support.google.com/mail/answer/8151?co=GENIE.Platform%3DDesktop&hl=en
Hope this helps