BounceBan is an email verification platform focused on helping businesses determine whether email addresses are genuinely deliverable, including addresses that are catch-all, greylisted, or protected by Secure Email Gateways. Rather than automatically treating every catch-all address as risky, the service uses proprietary algorithms to assess deliverability without sending an email. The company says its technology can reliably verify 85–95% of addresses in these challenging categories and can identify more deliverable or undeliverable emails in bulk tests while maintaining similar or better overall delivery rates than competitors.

BounceBan offers free, unlimited verification of individual email addresses in real time, as well as bulk list verification. Businesses can connect their CRM to automate daily email checks or integrate verification through an API, with custom solutions also available. The platform supports addresses involving services such as Office 365 and Google Workspace, and major email security gateways including Mimecast, Proofpoint, and Barracuda Networks. BounceBan also provides integrations and resources for users seeking to improve email deliverability and manage verification workflows.