Email Spam Checker
Free Email Deliverability Test & Spam Score Tool
Quickly check your Spam Score for free with our mail tester. Gain insights on how to keep your emails out of the spam folder from our comprehensive instant test report.
How It Works
Copy the address
Copy the unique test email address shown in the tool above.
Send from your platform
Send a real email from your actual sending infrastructure so SPF, DKIM, and DMARC checks are accurate.
Get your report
Click "Check your score" to receive a full deliverability analysis with actionable recommendations.
What Is an Email Spam Checker?
An email spam checker is a diagnostic tool that analyzes your email message before you send it to your list, identifying content triggers, authentication gaps, and technical factors that could route your message to the spam folder. InboxAlly's free Email Spam Checker evaluates your subject line, body content, embedded links, and sender authentication (SPF, DKIM, DMARC) to produce a detailed spam score report with actionable recommendations.
Relied on by deliverability teams, agencies, and ESPs since 2020
See How the Spam Checker Works
Don't just test for deliverability — Repair, increase, or optimize your email deliverability through active engagement.
Our clients have seen their open rates more than DOUBLE within 1-2 weeks!
Get StartedWhy Use an Email Spam Checker?
How Does The InboxAlly Email Spam Checker Work?
InboxAlly’s Email Spam Checker analyzes your email against the same criteria email service providers use. Send a test from your actual sending platform — so SPF, DKIM, and DMARC checks reflect your real infrastructure, not a simulation.
Your report covers spam score, authentication status, domain reputation, email headers, HTML validation, and link safety — with specific recommendations to improve each area.
The complete InboxAlly Platform goes further: it actively repairs your deliverability through real engagement signals at any scale.
Inside the Email Spam Checker Report
Every report checks seven key areas: SPF Authentication, DKIM Signature, Email Headers Analysis, Domain Reputation, HTML Validation, URL & Link Scan, and Template Quality Check. Each area receives a pass/fail result with specific guidance on how to fix any issues found.
How to stay in the Inbox?
An email spam checker cannot see abuse or bounce rates. The best way to ensure consistent inbox placement is to email interested and engaged subscribers.
Keep your bounce rates low with email address validation. Validate as soon as users subscribe and repeat testing every few months to identify deactivated accounts, complainers, and accounts that have become spam traps.
InboxAlly’s Email Deliverability Platform goes further — it teaches email service providers to put your messages in the Inbox through active engagement signals.
Understanding Your Spam Score
Inbox-ready. No significant spam triggers detected.
Issues detected. Review recommendations to improve your score.
High spam risk. Address the flagged issues before sending.
Frequently Asked Questions
What is an email spam checker?
An email spam checker is a tool that analyzes your email before sending it to identify issues that could trigger spam filters. It evaluates content, sender authentication, and technical configuration to generate a spam score and actionable recommendations.
How does an email spam checker tool work?
You send a test email from your actual sending platform to a unique address. The tool analyzes your email using the same criteria as mailbox providers, including content, authentication (SPF, DKIM, DMARC), domain reputation, and link safety, then generates a detailed report.
What causes emails to go to spam?
Common causes include missing or misconfigured authentication (SPF, DKIM, DMARC), poor sender reputation, spammy email copy, broken or suspicious links, and sending to inactive or invalid email addresses.
What is a good spam score for email?
A score of 75–100 typically indicates your email is inbox-ready with minimal spam risk. Scores between 50–74 suggest issues that should be reviewed, while scores below 50 indicate a high likelihood of landing in spam.
How can I improve my email deliverability?
Start by testing your emails before sending. Ensure your authentication records are properly configured, maintain a clean email list, avoid content that triggers spam, and send only to engaged subscribers. Fixing issues identified in your spam checker report can significantly improve deliverability. For content-specific improvements, InboxAlly’s free Spam Word Checker can help you identify spam words and refine your emails before sending.
Is there a free email spam checker?
Yes, InboxAlly offers a free email spam checker with no signup required. You can test your email’s content, authentication, and technical setup and receive a full deliverability report in minutes.
Does this tool work as an inbox placement test?
While it does not simulate inbox placement across providers, it functions as an effective inbox placement test by identifying the factors that influence whether your emails land in the inbox or spam folder.
Can I use this tool for email marketing campaigns?
Yes, InboxAlly’s email spam checker is designed for email marketing campaigns, including newsletters, automated sequences, and mass emails. By testing your email before sending, you can identify issues that may affect email performance, deliverability, and engagement. This helps ensure your campaigns reach more recipients and generate better results for your business.
The Free Checker Diagnoses.
InboxAlly Fixes.
InboxAlly teaches email providers to put your messages in the inbox — through real engagement signals that actively repair your sender reputation.
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