Domain age is one of the biggest reasons cold emails land in spam and most senders have no idea. This free tool lets you check any domain: Exact age (years + days), Registration & expiry date, Warmup stage: Too New / Cold / Warming / Established, Deliverability risk - will your domain hurt your emails? Just paste any domain or URL. Results in 2 seconds. No sign-up. Perfect for founders doing cold outreach, email marketers, and developers. Built by Reloop - open-source email infrastructure.