Free Domain Reputation Check

It tells you whether public blocklists currently record your domain or the servers behind it. It cannot tell you what a mailbox provider privately thinks of you. Gmail, Microsoft, and Yahoo each maintain their own reputation signals (complaint rates, engagement, recipient-level history) that no external tool can read. A clean blocklist result with mail still landing in spam is a normal and informative combination: it means the problem is in those private signals or in your authentication, not in a public listing.

Because they mean different things and conflating them is misleading. Several major blocklists refuse queries from public or unregistered resolvers, returning nothing at all, which looks exactly like a clean answer. Every list is therefore queried twice, once for your domain and once for a test entry it is guaranteed to answer. If the test query fails, the source is reported as not checked and left out of the totals rather than being counted as clean.

Domain reputation follows your domain wherever it sends from, so changing providers does not reset it. IP reputation belongs to the specific address a message left from, which for most businesses is their provider's shared infrastructure rather than anything they control. Both influence delivery. The practical rule: fix the domain-level causes, because those are yours, and identify the real outbound IP from a message header before assuming an IP problem is yours to fix.

Because a compromised website is one of the most common reasons a previously clean domain starts getting filtered. If your web host's IP is listed for distributing malware or spam, that reflects on the domain even when your mail flows through an entirely separate provider. The infrastructure layer also gives a usable answer on networks where the domain lists themselves refuse to respond.

Delisting is granted by the operator of each list, not by any checker. Open the evidence for each listing, fix the underlying cause: a compromised account, an open form being abused, a purchased list, a hijacked subdomain, and then follow that operator's own review process. Requesting removal before fixing the cause usually results in a relisting, sometimes with a longer minimum period.

Yes, in two ways. It may have been registered and abused by someone else before you bought it, so check its history rather than assuming a clean slate. And a new domain with no sending history is treated cautiously by default, which is why sending a large volume on day one tends to go badly. Neither is a listing, but both affect delivery.

Authentication is what makes reputation attributable to you. SPF and DKIM let a receiver confirm a message genuinely came from an authorized sender for your domain, and DMARC tells it what to do when neither aligns. Without them, anyone spoofing your domain contributes to how it is perceived, and you have no way to prove which mail was actually yours.

Regularly enough to catch a listing before it costs you a sending cycle: weekly for high-volume senders, monthly for occasional ones, and immediately after any report of mail going missing. A one-off check only tells you about the moment you ran it, so anything you need to know quickly has to be watched continuously.