Tech moves fast! Stay ahead of the curve with Techopedia!
Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.
A spam filter is an email service feature designed to block spam from a user’s inbox. Because a large amount of global email messages are spam, effective spam filters are critical to maintaining clean and spam-free inboxes.
By keeping pesky spam emails away, spam filters increase user efficiency by sparing tedious manual sifting of legitimate messages and spam email deletion.
There is no such thing as a perfect spam filter. Even the most popular email services are susceptible to two major weaknesses:
Thus, even established spam filters require some manual filtering, albeit to a lesser degree.