Not to be confused with summer fishing, "phishing" in the tech world is a different story, and an important one to know. We often get questions about phishing filters. A phishing filter can be a component of a web browser or Internet toolbar, or it can be part of an email program. Phishing filters evaluate websites for signs that they are connected to phishing scams. Phishing scams use email and websites that look like those belonging to legitimate sources (such as financial or government institutions) but are actually hoaxes.