An email filter is an app that blocks unsolicited emails from reaching a given inbox. A significant percentage of the email traffic around the globe involves spam messages: offers for pills or money, false banking notifications, and so on. Because of this, it’s really important to set up filters in order to avoid not only spam email messages, but also any chance of being conned in some way. Email filters detect different things, so as to ensure higher levels of security – specific words and phrases or the frequency with which they surface in the text, the sender’s email address, or the IP of the sender’s outbound SMTP email server. Web hosting companies frequently make use of the services of third-party spam-monitoring organizations that provide up-to-date databases in order to render email filtering easier and more efficient without affecting genuine messages, even if they contain suspicious words or phrases.