InboxGuard

Gmail Spam Checker

Gmail uses advanced spam filters based on content, reputation, and structure. Use this tool to test your email before sending to Gmail users.

Most emails fail not because of content quality, but because of hidden spam triggers, poor structure, and domain issues.

Paste your email (Ctrl + V)

Most emails fail silently. Check before you send.

Paste mode analyzes your raw email only.

Takes 5 seconds. No setup needed.

No signup required • No data stored

Why emails go to spam

Gmail filtering is heavily behavior and reputation aware. Promotional wording, unstable sender behavior, and weak trust signals can lower inbox placement.

How to check before sending

Paste your message above, run the check, and adjust before launching. Tools like InboxGuard help detect spam triggers before sending.

Common spam triggers

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  • Link-heavy blocks with little context
  • Inconsistent sender identity

Fix your email before sending

Test each draft before sends to Gmail audiences so risky copy and structure are fixed early.