Paste your subject line and email below. You will get an instant score out of 100 and the exact things that could send it to spam or the Promotions tab, with how to fix each one. Nothing you paste leaves your browser.
100% private. This runs entirely in your browser, nothing is uploaded or stored.
The words are only half of it. If your setup, domain reputation or list is the problem, that is exactly what we fix. Send us your last campaign and we will tell you what is really going on.
An email spam checker reads your subject line and email for the things spam filters and Gmail's Promotions tab react to: spammy words, shouting in capitals, too many links or images, and a missing unsubscribe link. A good score means the email itself looks clean. Whether it reaches the inbox also depends on your domain setup and your sending reputation.
Who this is for: Anyone about to send a newsletter, launch email or sequence from a bulk email platform.
| What it does | Gives an email a score out of 100 for spam and Promotions risk, then lists each problem with a fix. |
| Who it is for | Coaches, creators and founders checking a newsletter or campaign before they send it. |
| You put in | The subject line and the email, as plain text or the HTML from your email tool. |
| You get | A score, a verdict, and a checklist of passes, warnings and fails, worst first. |
| What it checks | Spam-trigger words, capitals in the subject, stacked punctuation, subject length, number of links, images against text, an unsubscribe link, and how much real text there is. |
| Runs | In your browser. Nothing you paste is uploaded or stored. |
| Price | Free. No sign-up. |
Last reviewed 29 October 2026 by Mohamed Bashir.
Gmail, Outlook and Yahoo decide where to file an email from three kinds of evidence. The first is who sent it: whether SPF, DKIM and DMARC pass, and the reputation of your domain and sending service. The second is how readers treat you: opens, replies, deletes without reading and spam complaints. The third is what the email looks like: the words, the links, the images and the layout.
This checker covers the third. It is the quickest to fix, because it is in your hands every time you write. But it is rarely the only cause. If your emails keep landing in spam after you clean them up, the problem is usually setup or reputation. Our email deliverability checker tests your SPF, DKIM and DMARC, and the guide to stopping emails going to spam covers the rest.
Every email starts at 100. Each problem takes points off, and the score cannot go below 0.
| Check | Points off | When |
|---|---|---|
| Spam-trigger words | 4 per word, up to 24 | A phrase from a list of about 65 classic spam words and topics appears in the subject or the email |
| Image-heavy, text-light | 20 | An HTML email with images and fewer than 40 words of text |
| No unsubscribe link | 15 | The word unsubscribe, or an unsubscribe merge tag, is missing |
| Too many links | 12, or 5 | More than 8 links, or 4 to 8 |
| Very little text | 10 | Fewer than 25 words |
| Capitals in the subject | 8 | A word of three or more capital letters (FYI and ASAP are allowed) |
| Stacked punctuation | 8 | !!, ??, $$ or a mix like !? |
| Many images | 8 | More than 3 images |
| Long subject | 5 | More than 62 characters |
| No subject | 4 | The subject line is empty |
80 or more reads as likely to land in Primary, 60 to 79 as at risk of the Promotions tab, and under 60 as likely to hit Promotions or spam. Those bands, the word list and the points are our own judgement, not rules published by Gmail or Outlook, which keep their filters private.
If your emails still land in spam or Promotions after you fix what it flags, that is the work our email deliverability service does.
Words tied to money, urgency and too-good offers, such as free money, act now, guaranteed, risk-free and winner, plus spammy topics like casino or crypto. One word rarely sends an email to spam on its own. Filters weigh it with your sending setup, your reputation and how readers treat your emails.
No. The score only reads the words and the build of the email. Where it lands also depends on SPF, DKIM and DMARC, your domain's reputation, your complaint rate and how each reader has treated you before. A clean email from a badly set up domain can still go to spam.
Spam is where filters put mail they do not trust, and most people never look there. Promotions is a normal Gmail inbox tab for marketing email that people do read. Fixing spam is usually about setup and reputation. Moving from Promotions to Primary is mostly about how personal the email looks and whether people reply.
Yes, for any marketing email. Since 2024 Gmail and Yahoo require bulk senders (more than 5,000 messages a day to their users) to support one-click unsubscribe, and UK and EU law expects an easy way to opt out. Keep the link small and plain rather than hiding it.
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