Go to https://app.incamail.com/en/login and click on the menu item Create free account.
On the next page, enter your details and set a password.
At the end of the setup process, you will receive this message.
Now go to your email inbox and open the email you have received.
After confirming the first time, you will need to confirm a second time.
This completes the setup of your IncaMail account.