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Will It Spam

Will It Spam

Find out why your newsletter lands in spam

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Upload the raw `.eml` of an email you already sent, or paste the HTML, and Will It Spam tells you in plain English why it might land in spam. It runs 12 checks: SPF, DKIM and DMARC read from the real headers, RFC 8058 one-click unsubscribe, the seven CAN-SPAM requirements, and content signals like spam words and image-to-text ratio. Every failure names the exact fix — the header to add, the line to change. No signup, nothing stored, and it runs on Cloudflare Workers — free, and it stays free.

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