To get setup with the email:
Email address - e.g. email@example.com
Password - Will be sent to you securely
You can access the webmail here:
Emails settings for other clients
If you want to access email using Thunderbird or your phone’s email client you will need the following instructions: https://docs.gandi.net/en/gandimail/standard_email_settings/
Most importantly the mail server is mail.gandi.net and the username and password are the same as above.