🛠️ Tool
✓ Link checked
Free
Beginner
Why we picked it Before you worry about whether your copy is persuasive, this catches whether it will even reach the inbox. It is genuinely free with no signup and highlights the exact words that trip filters (urgency phrases, exaggerated claims, money words, unnatural phrasing) right in your draft. The same words that spam filters hate also tend to read as pushy to a human, so cleaning them up improves both deliverability and tone at once.
Free Email Spam Checker
From Mailmeteor by Mailmeteor ~2 min per check
- Runs free with no signup and highlights spam trigger words inline so you can rephrase in context
- Flags five common offenders: fake urgency, ethically questionable language, exaggerated claims, money terms, and unnatural phrasing
- Deliverability is not only copy: it also reminds you that SPF, DKIM, DMARC, sender reputation, and too many links affect whether you land in the inbox