Email Verification API
Validate every address in real time and block disposable, invalid, and trap emails at signup.
Cold Email & Outreach · Free forever
Free Email Deliverability Test Tool - Inbox Placement Checker
Fix Deliverability Issues Before You Send
Instantly check SPF, DKIM, DMARC, blacklist status and spam score. Get actionable fixes to improve inbox placement for your cold email campaigns.
Run the tool
This tool performs a live lookup (DNS, WHOIS, or a page fetch) that a browser cannot do on its own, so the value you enter is sent to our server for that check. It is not stored. If the lookup is unavailable, the tool falls back to its offline formula and tells you.
Under the hood
How this tool works
No black box. This is the exact logic the tool runs on every input you give it.
Formula
Deliverability = 100 − Σ (Penalty × Weight) across syntax, domain, role, and reputation signals
- 1
Split your input into individual items and normalise whitespace and casing.
- 2
Run each item through the signal checks that make up the formula above.
- 3
Apply the weight of every failed signal as a penalty against a perfect score.
- 4
Return a 0–100 score with the exact reasons behind each deduction.
Need this at scale?
Two Govarova products that do this automatically
The free tool handles one input at a time. These handle millions — verified, enriched, and ready to send.
Govarova Outreach
Run multi-step cold email cadences with AI personalisation, tracking, and a built-in CRM.
More free cold email & outreach tools
Register & start — free
Run Free Email Deliverability Checker as often as you like. When you are ready to do it across your whole market, Govarova is waiting.