Free Tool
Paste your subject line or email copy and instantly see which common spam trigger words and phrases could hurt your deliverability.
Modern spam filters at Gmail, Outlook and Yahoo rely heavily on machine learning and sender reputation rather than simple keyword blocklists — a single trigger word will rarely send a well-authenticated, reputable sender straight to spam on its own. But trigger-word patterns still matter in two real ways: they contribute to the overall spam score your content receives, and they correlate strongly with the kind of pushy, low-quality email that damages engagement and, over time, reputation.
Use this checker as a content quality signal, not a strict pass/fail test — the goal is writing email that reads like it is from a real person, not a mass blast.
No. Modern spam filtering relies mainly on sender reputation and authentication (SPF, DKIM, DMARC), not keyword blocklists. Avoiding trigger words helps content quality but won't fix deliverability issues caused by reputation problems.
Yes — using a word once in genuinely relevant context is very different from stacking multiple trigger phrases together with excessive punctuation. Context and frequency matter more than any single word.
Sender authentication (SPF, DKIM, DMARC), consistent sending patterns, and genuine subscriber engagement all matter significantly more for deliverability than word choice alone.