Free tool · Test
Why is my email going to spam?
Send one email to the address below. In a few seconds you get a score out of 10 and a list of exactly what a receiving mail server sees: authentication, the sending IP's reputation, content and headers.
Fix this by sending through Groundmail
Groundmail sends from our own mail servers and IP space, signs every message with your domain's DKIM key and sets a return path on your domain, so SPF, DKIM and DMARC line up. Start free and run the test again.
What the test checks
Authentication: whether SPF passes for the server that delivered the message, whether the DKIM signature verifies, and whether either lines up with your From domain so DMARC passes.
Reputation: the sending IP's reverse DNS and whether it resolves back, and whether the IP or your domain is on the major blocklists.
Content and headers: a plain-text part next to the HTML, the image-to-text ratio, link shorteners and blocklisted links, one-click unsubscribe for bulk mail, and the Message-ID, Date and From headers every message needs.
How to send the test
Send it the way your real mail goes out: from your app, your provider's API or your SMTP relay, with a real template. A test typed into Gmail by hand checks Gmail's servers, not yours.
Each address takes one message and is open for 24 hours. The report has its own link that you can share, and it's deleted after 7 days.
Go deeper: Why password reset emails go to spam
Questions
Why is my email going to spam?
Usually one of three things: authentication (SPF, DKIM or DMARC missing or not aligned with your From domain), reputation (the sending IP or domain is blocklisted, new, or shared with bad senders), or content (HTML with no text part, mostly images, link shorteners). The test checks all three and tells you which one it is.
Is the spam test free?
Yes. There is no sign-up and no limit beyond a few test addresses per hour per visitor, which stops abuse.
What happens to the email I send?
The test address only receives. We read the message once to build the report, keep the report and the subject line, and never store the body. Nothing is forwarded or replied to. Reports are deleted after 7 days.
What is a good spam score?
9 or more is excellent: a mailbox provider has no technical reason to filter the message. 7 to 9 is good with small fixes to make. Under 7, at least one problem is likely costing you inbox placement, and the report lists it first.
Does a 10/10 mean my email will reach the inbox?
It means nothing technical is holding it back. Gmail and Outlook also weigh your sending history and how recipients react, which no test can see. Authentication and a clean IP are what you control, and they're what this test checks.