Be sure you follow the settings instructions carefully.
The most common problem for users who can’t log in is that they don’t use the full email address as the username. This will enable you to use your own choice of software to send and receive email from your domain’s Gandi Mail addresses. Here you can find the standard mail settings you should use to set up your email client to work with Gandi’s email, either as an IMAP or POP account.
