Checks a sending domain or IP against the public DNS blacklists that allow browser lookups. If something here flags you, your deliverability already knows.
Privacy: this tool runs entirely in your browser. When you click Check, one DNS query for the domain you typed goes to Cloudflare's public DNS resolver (Google's as fallback). Nothing is stored, logged or sent to GrowthPal.
DNS blacklists are reputation databases receivers consult in real time. One listing on a minor list is survivable; a listing on a major one sends your mail to spam at scale. In cold email the usual causes are bounces from unverified lists, volume spikes past warmup, or a spam-trap address that should never have been on the list at all. The fix is never "wait it out": find the cause, fix it, then request delisting.
Tools check the plumbing. The message is what your market answers. Get your TAM mapped, your ICP broken down and 5 angles written for your buyers, free.