If you are a NEOJAPAN's desknet's user, you can strengthen your WebMail system with Denbun.You can use [Tab Menu] feature in desknet's so that users do not have to login Denbun.
By using Denbun with multilingual groupware "desknet's Enterprise Edition Multilingual Version" or "desknet's Middle Edition Multilingual Version", you can construct an internal communication platform quickly and with low cost.