(If the question's serious...) many email providers that give IMAP access will let you set up a "mark spam" folder and they'll check it to update their spam fil

(If the question's serious...) many email providers that give IMAP access will let you set up a "mark spam" folder and they'll check it to update their spam filter for you. Otherwise, search for "your mail reader" and "mark spam" and you'll probably figure something out.