For hosting contracts with Mail Basic or Mail Business
If you have forgotten your email password, you can assign a new password for your email address by following the steps described here.
Log in to My 1&1 IONOS.
In the Mail section, click Manage email addresses.
Click the arrows in the line of the email address concerned to see the other options.
Click Change Password.
Enter the desired new password and repeat it.
Your new password will now be activated. This may take a moment.