Free spam test

Email spam test: how does your message score?

Leave your work email and get a test address. Send your message there: in a few seconds you see a score from 0 to 10 and, for every check, what to fix.

Free, 3 tests a day. Your company email is required.

We use your email to send the test address and the result and, only if you tick the box, offers and news. The message you send is analysed by a program, stays 24 hours on our mail server in the EU and is then deleted; only someone with the link can see the result. Privacy policy.

  • Free, 3 tests a day
  • A real spam filter, not a word list
  • What to fix, in order
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how it works

Three steps, a couple of minutes

Leave your email

We show you a test address right away, valid for 24 hours. You also get it by email.

Send your message

From the program you normally use: newsletter tool, CRM, website or app. A real email, the same your customers get.

Read the score

From 0 to 10, with every check explained and the things to fix in order of importance.

the checks

What we look at in your message

Authentication

SPF, DKIM and DMARC: does the email really come from your domain?

Blocklists

The sending IP and the domains in the message, on the lists we query.

Sending server

Reverse name, server greeting, encrypted connection.

Headers

Message-ID, date, sender and one-click unsubscribe.

Content

Plain-text part, text to image balance, shortened links, HTML errors, size.

Filter verdict

The verdict of a real spam filter (rspamd), with every rule that fired and its points.

The score describes how your message looks. It is not a promise of inbox placement: every mailbox provider decides on its own, also from how recipients treated your past emails.

Frequently asked questions

How does the spam test work?

You leave your work email and get a test address. Send the message you want to test there: our mail server receives it, runs it through the spam filter and within seconds the page shows the score with every check.

Where does the score come from?

It starts at 10 and loses points for every failed check. The checks are real: the verdict of an actual spam filter (rspamd, the same one protecting our own mail), SPF, DKIM and DMARC records, blocklists, headers and the structure of the message. We do not use lists of forbidden words.

Does a high score mean I reach the inbox?

No. The score says the message looks right, but every mailbox provider decides on its own, also from how recipients treated your past emails.

What do you do with the email I send?

A program analyses it, not a person. The message stays 24 hours on our mail server in the EU and is then deleted. Only someone with the link you get by email can see the result. After 24 hours we keep only the score and the short outcome.

Why do you need a company email?

The test is about emails sent from your own domain: with a Gmail, Yahoo or Outlook address you would be measuring their service, not yours. You can run up to 3 tests a day.

What if your server rejects my email?

We tell you, with the reason. Our mail server, like many, refuses right away emails that fail DMARC when the domain asks for rejection and those coming from a server with no reverse name. In that case the test shows why it was rejected and what to fix, without the content analysis.

Can I test a newsletter?

Yes. From your newsletter tool send a preview or a test send to the address we give you: that way the test sees the same headers and signature as your real emails.

Do your website or app emails still leave from the hosting server?

SMTP Senpai is the MailSenpai SMTP relay: it signs your emails with DKIM on your own domain, gives you the DNS records to publish and checks them for you. Sending servers in the EU.

Free · 3 tests a dayRun the test