@SCoccia use an email without TLS is a security issue.
You need to know how configure email and email host.
Are you sure your host is working on the format mail.mydomain.it ?
Are you sure the port is 143?
I use port 993 with a valid certificate.
Be sure settings you insert are correct and can work in a client email for example.
There is no bugs or issue in UVdesk as I'm using this and is working so if doesn't work is probably an error in some configuration you insert. Can be the port, can be that you have no security on email (no TLS), etc.
You can try maybe with Gmail as suggested but using a specific password for app.
Usually port for outgoing email is 587 or 465