SOGo Webmail
How to use SOGo webmail
Gandi provides you with SOGO-based webmail that you can access through any browser. You can use it to check and send messages from one email address at a time.
Go to :
https://webmail.gandi.net/SOGo/
and log in with the (full) email address as the username and its password for your chosen mailbox.
Note
Your Gandi account handle/username and password can't be used to log into Webmail.