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Email spam checker

Will your email land in the spam folder? Paste your subject + body and we'll surface the same red flags Gmail / Outlook / Yahoo Mail filters look for: spam-trigger words, ALL-CAPS bursts, link density, money signs, suspicious greeting patterns. Nothing leaves your browser session.

Input

Subject line Body

Spam risk

10.0 / 10

High risk

Higher = more likely to be filtered as spam.

Per-ESP guidance

Gmail: drops to Promotions if body has ≥ 4 links + body < 50 words. Money signs in subject reduce inbox placement ~20%.
Outlook 365: AllCaps + 2+ exclamation marks triggers SmartScreen heuristic. No-greeting cold emails get flagged as bulk.
Yahoo Mail: spam-trigger words from known list (FREE, ACT NOW, ENLARGE…) reduce sender reputation directly.
Apple Mail: mostly clean-text scoring — link density > 3 + body < 30 words → likely spam.

How is this different from the template checker?

Spam checker is laser-focused on the "will this hit spam?" question with per-ESP red flags (Gmail / Outlook / Yahoo / Apple). The broader template checker scores readability, personalisation, reading time, and overall quality — what a copywriter looks at. Run both: one tells you if it'll be delivered, the other tells you if it'll convert.

Want to go beyond keyword checks? Create a Warmup account to monitor real placement rates across 20+ ESPs, warm up your inbox with our peer network, and get AI-powered subject + body rewrites in our /app/ai-tools/* dashboard.