Mail Business
Mail Business is a type of IONOS email account with more power and features than Mail Basic, including the synchronization of your emails, calendars, contacts, and tasks between all of your devices. You can upgrade email addresses created in your IONOS packages that come with Mail Basic accounts, or alternatively, you can get Mail Business in its own package that comes with its own domain and 50 GB of email storage space for each mailbox.
Webmail, spam filter and virus protection are included with the upgrade.
Depending on the package/upgrade selected, Mail Business can be used by 1 to 10 users and has real-time synchronization of all data as well as tools for teamwork.