Free email spam checker & deliverability test
Send a real email and get a 0–10 deliverability score across SPF, DKIM, DMARC, reverse DNS, blocklists and content — each with a plain-language fix.
web-6ed193ace15a2d7f6ba1@inbox.mailspamchecker.com
Step 2 · Send a real email to it from your normal mailbox or sending tool.
We’ll watch for it and score it live on the next screen — you don’t have to send it before clicking.
How the spam test works
- Copy the unique address above and send a real email to it from your normal sending setup.
- Our mail server receives it and captures the sending IP, HELO and TLS — signals you can’t inspect any other way.
- We evaluate SPF, DKIM, DMARC alignment, reverse DNS, blocklists, content and one-click unsubscribe.
- You get a 0–10 score with a prioritized, plain-language list of exactly what to fix.
What we check
Free deliverability tools
Need to check one thing fast? Use a focused tool — no email required:
Frequently asked questions
How does the spam checker work?
You send a real email to the unique address shown above. We receive it on our own mail server, analyze the message, your sending server, DNS authentication, blocklists and content, then show a 0-10 deliverability score with fixes.
Is a 10/10 a guarantee of inbox placement?
No. A high score means your authentication, infrastructure and content are clean, but inbox placement also depends on your sender reputation and recipient engagement.
What does the score include?
SPF, DKIM and DMARC with alignment; reverse DNS (PTR); TLS; IP and domain blocklists (Spamhaus and others); SpamAssassin content analysis; links; and one-click unsubscribe.
Is it free?
Yes — the score is free. You can run a limited number of tests per day.