VBSpam is a comparative benchmark that tests how email security products handle wanted, unwanted, and malicious mail streams. It measures how well a gateway or filter separates legitimate messages from spam, phishing, and other threats without blocking too much normal mail.
This matters because modern attacks often blend into ordinary traffic, using trusted delivery services, authenticated sender identities, and hidden URLs. A product may score well on obvious spam but still miss link-based phishing or cloaked destinations that only become dangerous after a click. Defenders use VBSpam-style results to compare detection quality, false positives, and resilience across realistic mail mixes. In practice, these evaluations help teams choose controls that go beyond sender reputation and inspect the full risk path from inbox to landing page.