An email filter is a software app that’s installed on an email server and ‘scans’ all incoming emails in order to hinder any unwanted ones from reaching a specific inbox. Several examples of such emails would be: offers for pills or cash, fake bank statements or attachments that contain malware sent with the idea to damage your computer. Email filters usually check the content of an email and if they spot specific keywords or other suspicious content, they either erase the email message or forward it to the Junk/Spam folder instead of the Inbox folder. Certain web hosting providers combine their own email filters with up-to-the-minute databases from spam-tracing organizations, so as to ensure better security for their clients. Such databases contain patterns, mail server IP addresses and other information about spam email messages recently reported by these organizations.