Mail Tester
Paste a full email and get one 0-100 mail-health score from real SPF, DKIM and DMARC results plus a content spam analysis. Free email tester with AI fixes.
Test your email
Paste a full raw email — headers and body. We score authentication and content together.
What this mail tester does
Common use cases
- 1Testing a campaign before you send it
- 2Diagnosing why mail lands in spam
- 3Verifying a new sending setup end-to-end
- 4Checking authentication actually passed
- 5Reviewing cold-email copy for triggers
- 6Producing a mail-health score for a report
Related tools
About mail testing
Reaching the inbox depends on two things you control: authentication (does SPF, DKIM and DMARC pass?) and content (does the message look spammy?). Testing only one leaves a blind spot.
This tester reads the real authentication verdicts already recorded in the email's headers and pairs them with a content spam analysis, blending both into a single mail-health score. Because it uses the actual headers of a message you received, the auth results are genuine — not a guess. Paste a copy of the email you sent to yourself for the most accurate picture.
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Got Questions? We Have Answers.
How does the mail tester work?
Paste a full raw email — headers and body. The tool reads the real SPF, DKIM and DMARC results already recorded in the headers, analyses the body for spam triggers, and blends both into a single 0-100 score.
How do I get the full email source?
In Gmail open the message, click the three-dot menu and choose "Show original"; in Outlook use "View source" or "View message source". Copy everything and paste it in.
Why paste an email I sent to myself?
The authentication verdicts in the headers are added by the receiving server, so a copy you emailed to yourself contains the real SPF/DKIM/DMARC results for your sending setup.
Is my email uploaded anywhere?
Parsing and scoring happen in your browser. Only if you click "Get fixes with AI" is a short summary sent to the AI helper — never the full message automatically.
What makes a good mail-health score?
Aim for 90+. You reach it with SPF, DKIM and DMARC all passing and a low content spam score. Failed authentication or spammy content drops the score.
Does a high score guarantee the inbox?
No. It confirms strong technical foundations, but placement also depends on list quality, sending reputation and recipient engagement.