# Email spam checker

https://salesbond.app/tools/email-spam-checker/
Updated: 2026-11-05

# Email Spam Checker: Spam Words and Subject Lines

Paste your subject line and email to see a low, medium or high spam risk. The checker highlights about 300 spam trigger words in five groups, flags capitals, exclamation marks, currency signs, shortened links and a fake “Re:”, and suggests a calmer word for each. Free, no sign-up, and nothing leaves your browser.

The check updates as you type. Fix the items at the top of the list first: they add the most risk. Your draft is kept in this browser until you start over.

## Spam trigger words by group

| Group and examples | Points each |
| --- | --- |
| Deceptive or shady: verify your account, this is not spam, you have won | 3 |
| Money and income: extra income, make money, lowest price | 2 |
| Too good to be true: 100% free, risk free, guaranteed | 2 |
| Urgency: act now, limited time, last chance | 1 |
| Salesy pressure: click here, buy today, the best | 1 |
| Risk: low under 5 points, medium 5–11, high 12 and more | ×2 in subject |

## How to keep sales emails out of spam

Write like one person to another: a plain subject that says what the email is about, a short text with one question and one link at most. Authenticate your domain with SPF, DKIM and DMARC, warm up a new mailbox slowly, send only to people who are likely to care, and make it easy to say no. Replies are the best signal you can send a mailbox provider; spam complaints are the worst.

## Before you hit send

Work out the address with the [email format finder](https://salesbond.app/tools/email-format-finder/), add a clean [email signature](https://salesbond.app/tools/email-signature-generator/) with real contact details, and send a test to your own inbox to see how the email looks.

## Frequently asked questions

### How do I check if my email will go to spam?

Paste the subject line and the text into the checker: it flags spam trigger words, capitals, exclamation marks, currency signs and risky links and gives a low, medium or high risk. Then send a test to your own Gmail and Outlook inboxes. No tool can promise the inbox, because each provider also weighs your sender reputation.

### What are spam trigger words?

Words and phrases that spammers use a lot, so filters and readers grow suspicious of them: promises of money (“extra income”), offers that sound too good (“100% free”, “risk free”), false urgency (“act now”), salesy pressure (“click here”) and phishing language (“verify your account”).

### Do spam words alone send an email to spam?

Rarely. Gmail and Outlook judge the sender first: whether the domain is authenticated with SPF, DKIM and DMARC, how many people mark your emails as spam (Gmail asks senders to stay under 0.3%) and whether people open and reply. Spam words add risk on top, so a clean text helps most when the rest is in order.

### Is the word “free” always bad?

No. One “free” in a clear sentence is fine, especially for a free trial people asked for. It becomes a problem in the subject line, in capitals, next to other trigger words or repeated through the email. The checker counts the subject double and stops counting a phrase after it appears twice.

### How long should an email subject line be?

Under 60 characters, and ideally 30 to 50, so it is not cut off on phones. Write it in sentence case, without exclamation marks, currency signs or more than one emoji, and make it describe what is inside: a misleading subject breaks the provider rules and loses trust.

### Why are “Re:” and “Fwd:” flagged?

Putting “Re:” or “Fwd:” on the first email to someone pretends there was an earlier conversation. Readers feel tricked, report the email as spam, and providers treat misleading headers as a sign of spam. Use them only when you really reply or forward.

### Is my email stored or sent anywhere?

No. The check runs in your browser and the draft is saved only in this browser so you can come back to it. Nothing you paste is sent to SalesBond or anyone else. Click Start over to clear it.

Related tools: [email format finder](https://salesbond.app/tools/email-format-finder/), [email signature generator](https://salesbond.app/tools/email-signature-generator/), [UTM builder](https://salesbond.app/tools/utm-builder/). More on sales and running a sales team on the [SalesBond blog](https://salesbond.app/blog/) and the [home page](https://salesbond.app/).

## Official sources

- [Gmail Help: email sender guidelines](https://support.google.com/a/answer/81126) — authentication, spam rate under 0.3%, headers and content that are not misleading.
- [Microsoft Support: overview of the Junk Email Filter](https://support.microsoft.com/en-us/office/overview-of-the-junk-email-filter-5ae3ea8e-cf41-4fa0-b02a-3b96e21de089) — Outlook weighs the content of the message among other factors.

**Updated on Nov 5, 2026.** This calculator is for information only and is not tax, legal or payroll advice. The score is a guide to wording and formatting, not a delivery test; send yourself a test email before a campaign.