In Italy you will find having a PEC will make your life easier especially when dealing with companies and public bodies. There are a number of providers. Aruba pec.it is the easiest to deal with.
You can also use the Post Office, but it’s hit and miss on whether or not you can open one, some post officers seem to require different documents than legally required or you might get someone that just refused to accept your permit or passport, so easier to do it online.
Certified Electronic Mail (PEC) has the same legal value as a traditional registered letter with acknowledgment of receipt. To certify the sending and receipt of a PEC message, the mail manager sends the sender a receipt which constitutes legal proof of the successful sending of the message and of any attached documentation. In the same way, the manager sends the sender the receipt of successful (or failed) delivery of the message, with a precise time indication.
It is possible to consult and extract the PEC addresses of any public body thanks to the Index of Public Administrations . Each PA has the obligation to create a PEC box for each protocol register and communicate each address to the AgID.
The official list of PEC providers is here https://www.agid.gov.it/index.php/it/piattaforme/posta-elettronica-certificata/elenco-gestori-pec