As default, you use your primary E-Mail account in the groupware. If you use further E-Mails accounts like Google Mail, you can access those E-Mail accounts from within the groupware, provided you set up those accounts as external E-Mail accounts. There are the following options:
You can change your primary E-Mail account's name or standard folders by editing the primary E-Mail account.
You can set up or edit external E-Mail accounts.
You can use your set up external E-Mail accounts in the groupware.
Parent topic: E-Mail