Hi HN, I’m Rami. I recently built Tempo Checker to help developers identify and block disposable, temporary, or burner email addresses during user registration.

I built the core logic using Go and Python. To make the detection as accurate as possible, the system relies on a multi-layered validation approach:

Live MX DNS Checks: It verifies the domain actually has mail exchange records configured and can receive mail.

Domain Blocklists: It cross-references the domain against an aggregated list of known disposable and temporary email providers.

I built this because I wanted a fast, straightforward API to handle fake signups without adding unnecessary overhead to backend flows.

I'd love for you to test it out. I'm especially open to feedback on handling edge cases with MX records, ways to improve the blocklist methodology, or any general performance critiques.

Thanks!