What is an email spam checker?

An email spam checker analyzes your email content to identify spam trigger words, AI-sounding phrases, and salesy language that could cause your email to land in spam folders. Sendable checks for over 1,000 spam trigger words across 4 categories.

Is Sendable free to use?

Yes, Sendable's email spam checker is completely free to use with unlimited checks. No signup or credit card required.

How is Sendable different from Mail-Tester or GlockApps?

Traditional tools like Mail-Tester and GlockApps check your server settings (SPF, DKIM) AFTER you send. Sendable analyzes your actual email CONTENT BEFORE you send, detecting spam words, AI phrases, and weak language that hurt deliverability.

What spam trigger words does Sendable detect?

Sendable detects over 1,000 spam trigger words across 4 categories: AI-sounding phrases (like 'I hope this finds you well'), pushy sales language (like 'game-changer'), weak calls-to-action (like 'pick your brain'), and overused compliments.

Do you store my emails?

No, Sendable does not store your emails. All analysis happens in your browser and no email content is sent to our servers.

Sendable

Free Email Checker

1,000+ Spam Words

FromSloppy✗toPolished✓Emails

Free email spam checker that analyzes your content before you send—not just server settings.
Test for spam trigger words, AI-generated phrases, and salesy language that lands emails in spam folders.

Paste or type your email

Dear friend, I hope this email finds you well! I came across your profile and I'm truly impressed by your work. I am a Financial Consultant in control of privately owned funds placed for long-term investments. My client intends to invest these funds in projects. I wanted to reach out because I think there's a strong fit between our companies. We offer a game-changing solution that could skyrocket your results by 500%!! This is a limited time exclusive offer - only a few spots left! Act now to guarantee your success. Would you be open to a quick 15-minute call at your earliest convenience? Please let me know ASAP!! Looking forward to potentially collaborating! Best regards

Analysis Results

Overall score:

Waiting...

Words:

No issues found!

Your email looks clean

How It Works

Three Simple Steps

Improve your email deliverability in under 30 seconds

Paste Your Email

Simply paste your cold email into the checker. No sign-up required for analysis.

See What's Wrong

Instantly see highlighted problem areas with color-coded categories.

Fix & Send

Copy your email with a ready-to-use ChatGPT prompt, or manually fix the flagged phrases.

Why Sendable

Everything You Need to Fix Your Emails

Built specifically for cold emailers who want to avoid the spam folder and get real responses.

Instant Spam Check

Real-time spam word detection as you type. Check your email for spam triggers instantly—no waiting.

1,000+ Spam Trigger Words

Comprehensive spam word database including AI-generated phrases, salesy language, and words that trigger spam filters.

4 Spam Categories

Spam words organized by type: AI phrases, pushy sales language, weak CTAs, and overused phrases that hurt deliverability.

Email Spam Score

Get an email deliverability score showing how likely your email will avoid the spam folder.

Free Spam Checker

Unlimited free email spam checks. No signup required—test as many emails as you want.

AI Email Rewrite

One click generates an AI prompt to fix flagged spam words. Better than Mail-Tester for content optimization.

Why Sendable is Different

Not Just Another Spam Checker

Traditional tools like Mail-Tester and GlockApps tell you if your email landed in spam.
Sendable tells you why it will—before you hit send.

Feature

Traditional Tools

✨Sendable

✗Test AFTER you send

✓Optimize BEFORE you send

✗Check server settings (SPF/DKIM)

✓Analyze your actual words & tone

✗Requires sending test emails

✓Instant feedback as you type

✗Tells you IF it went to spam

✓Tells you WHY it sounds spammy

✗Limited free tests per day

✓Unlimited free checks forever

Great tools for what they do—but they solve a different problem:

Mail-Tester•Spam scoring after sending

GlockApps•Inbox placement testing

Mailtrap•Developer sandbox

MxToolbox•DNS & blacklist checks

Pro tip: Use Sendable to clean your copy, then test with Mail-Tester for deliverability.

Questions?

Frequently Asked Questions

Everything you need to know about Sendable

Sendable flags over 1,000 spam trigger words and phrases across 4 categories: AI-sounding openers (like "I hope this finds you well"), pushy/salesy language (like "game-changer"), weak CTAs (like "pick your brain"), and overused compliments (like "I'm truly impressed"). These are phrases that commonly trigger spam filters or make recipients hit delete.

Ready to improve your emails?

Stop Getting Ignored.
Start Getting Replies.

Join hundreds of cold emailers who use Sendable to write emails that actually get responses. It's free to check your emails—no sign-up required.

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