If you use a 1&1 IONOS email address, you can change your anti-spam settings directly in Webmail. Simply follow the steps below.
- Log in to WebMail.
- In the top-right corner of the screen, click on the symbol with the three horizontal lines and select Edit settings.
- Select Mail followed by Anti-SPAM.
- Now you have the option to select predefined spam protection levels or apply custom spam settings.