Catch all addresses are the hardest case in list hygiene. The domain accepts every message at the server, so most verifiers mark them risky and leave you guessing whether a contact is real. BounceBan was built specifically for that problem and verifies these tricky addresses with a claimed accuracy above 97 percent. It also handles addresses behind secure email gateways, and it offers single, bulk, API, and CRM sync verification, so it fits quick manual checks and fully automated pipelines alike. Single verifications are free forever, the credits you buy never expire, and pricing runs pay as you go or as a discounted subscription. In a stack it sits right before sending. It is the cleanup layer that decides which contacts are genuinely safe to email, which protects sender reputation and keeps bounce rates low as volume climbs across many domains. BounceBan is our default verify step. We run every email through it inside our Clay enrichment waterfalls, with DeBounce or ZeroBounce as the alternates when a client already runs one of those. On catch all heavy lists it recovers contacts other verifiers would drop. On the niche segments we work, those recovered leads are often the best accounts on the list, so a verifier that does not throw up its hands at catch alls earns its place in the build.