In Zibster Mailbox, managing unwanted emails is straightforward. If you receive an email that you suspect is spam, you can easily mark it as such to improve your mailbox's filtering capabilities. To do this, simply open the email and click on the "Mark as Spam" button. This action will move the email to your spam folder and help Zibster's system recognize similar emails in the future, enhancing the overall effectiveness of your spam filter. By actively marking unwanted emails as spam, you contribute to a cleaner inbox and a more efficient email experience.