For Web Hosting customers with a 1&1 IONOS email address
With the import function you can easily transfer your data from other applications to the 1&1 IONOS WebMail.
Step 1
Log in to 1&1 IONOS WebMail.
Step 2
Under Calendar, click the Options icon, and then click Import.
Step 3
Upload the iCal file. If existing events are to be ignored, set the corresponding check mark. Finally, click Import.