Free email deliverability test
Most cold email never reaches the inbox — and the sender never finds out. This free tool reads the public DNS records that Gmail, Outlook and every other mailbox provider use to judge your mail, then scores your domain out of 100 with the exact steps to fix what's wrong. No login, no sending, no access to your mailbox.
What we check
SPF — confirms which servers may send mail for your domain, and flags a too-permissive +all policy.
DKIM — looks for a published signing key so receivers can verify your messages weren't altered.
DMARC — checks your policy and warns when it's set to p=none, which enforces nothing.
MX & provider — detects your mail host (Google Workspace, Microsoft 365, custom).
Blacklist & domain age — checks the Spamhaus domain blacklist and flags brand-new domains with no sending reputation.
Why deliverability decides your reply rate
You can write the perfect message, but if your domain fails authentication it lands in spam and never gets read. Fixing SPF, DKIM and DMARC is the highest-leverage thing most senders can do — and it's usually a five-minute DNS change once you know what's missing. That's what the score above tells you.
Frequently asked questions
What is an email deliverability check?
It inspects the public DNS records mailbox providers use to decide whether your email reaches the inbox, the spam folder, or gets rejected — your SPF, DKIM and DMARC records, your MX setup and blacklist status — then scores the result out of 100 with the exact fixes.
What do SPF, DKIM and DMARC do?
SPF lists which servers may send for your domain. DKIM signs your mail so receivers can verify it wasn't tampered with. DMARC tells receivers what to do when SPF or DKIM fail. Together they prove your mail is legitimate — the biggest single factor in landing in the inbox.
Why is my cold email going to spam?
Usually missing or misconfigured SPF/DKIM/DMARC, a brand-new domain with no reputation, a blacklisted domain, or too much volume too fast. The check above shows which apply to you.
Is this checker free?
Yes — the score and every check are free and need no login. It reads public DNS only; it never connects to your mailbox and never sends anything.
Does it work for any provider?
Yes — any domain on any provider, and it auto-detects your mail provider and DNS host, including European hosts like WebSupport and Forpsi.