Ariful A.

You can try BetterEnrich.com for that. It aggregates 17+ data providers and ensures only mobile numbers, no charges for landlines or VoIP or toll-free etc like others.

Clark G. try BetterEnrich.com it has a feature called "Check ESP from email". It'll tell you if they're using proofpoint or barracuda etc. Interestingly it's totally free to check ✅

Pontus B. Jalen N. if mobile numbers are priority, check out BetterEnrich. It aggregates 17+ data providers and ensures only direct mobile numbers (no landline or VoIP etc) using a multi-layer verification system.

Luis H. if accuracy is the priority, can check betterenrich.com it pulls from 17+ data sources and provides only direct mobile numbers (no landlines, voip or toll-free etc) using a multi-layer verification system.

Daniel M. you can try betterenrich.com pulls from 17+ data providers and ensures only verified emails at lower price.

My pleasure!

In the sense that both mean you can’t get a definite valid or invalid, they’re similar but the reason for failure is different. Catch-all is when the server accepts all emails, even if the mailbox doesn’t exist, while unknown is when no reliable response was received at all.

Ivan D. "unknown" also comes from million verifier. That says it tried to verify but failed due to temporary error and didn't get a definite response if it's valid or not.

Grant H. You can check BetterEnrich.com if accuracy is the priority. It provides only direct mobile numbers, no landlines or VoIP etc.

Pontus B. Yes, BetterEnrich aggregates multiple providers to maximize the coverage along with better accuracy so definitely can do that.