Email Deliverability Test
Enter your domain and we'll check its mail servers (MX) and authentication records (SPF, DMARC, DKIM) live, in one scan — so you can see what mailbox providers see before you send.
How it works
- 1Enter your sending domain (e.g. yourcompany.com).
- 2We query MX, SPF, DMARC and DKIM records via DNS.
- 3See what's set up correctly and what's missing or risky.
Frequently asked
What does this test check?
Whether your domain can receive mail (MX) and whether the three authentication standards mailbox providers expect — SPF, DMARC and DKIM — are published and well-formed.
Why does authentication matter?
Since the 2024 Gmail and Yahoo sender rules, mail from domains without SPF, DKIM and DMARC is far more likely to be filtered or rejected — even if the list is clean.
Is this enough on its own?
Authentication gets you to the inbox; list quality keeps you there. Pair a passing deliverability test with a verified list for best results.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.