
I run cold email at volume, and catch-all (accept-all) domains are the single biggest blind spot in list cleaning. Every SMTP-based verifier I've used just stamps those addresses "risky" or "unknown" and hands the decision back to me — which in practice means either burning my sending-domain reputation on bounces, or throwing away perfectly good leads. No2Bounce is the first tool I found that's purpose-built for exactly that last mile: it actually validates catch-all mailboxes (real inbox vs. accept-all facade) instead of bailing out at the SMTP layer. The fact that it exposes this through a clean REST API (submit an email, poll by tracking ID, simple token auth) sealed it for me — it drops straight into an existing verification pipeline sitting between my SMTP verifier and the campaign, no manual exports. Credit-based pricing also means I can scale it to the size of the catch-all segment I'm cleaning instead of committing blind. Review collected by and hosted on G2.com.
The website could be clearer, before purchase, about which plan tier unlocks API access and where to grab the API token — I had to dig to confirm the API was on my plan. Otherwise no complaints so far. Review collected by and hosted on G2.com.


