Enter your domain: we instantly check the major blacklists (Spamhaus, SpamCop, PSBL) — the #1 cause of emails landing in spam.
Free, no signup. Result right on this page.
Mail servers worldwide consult blacklists (DNSBLs) before accepting a message. If your domain or your website's IP is on one, your emails land in spam — or get rejected outright — with no warning. Many small businesses lose clients for weeks before noticing.
The most common causes: a hacked website sending spam without your knowledge, a contact form abused by bots, a misconfigured sending provider, or an IP address shared with a bad neighbour. The good news: once the cause is fixed, delisting can be requested for free on each list's website.
1) Find the cause (run our full security check — a vulnerable site is often the entry point). 2) Fix it. 3) Request delisting on the list's site (Spamhaus, SpamCop…). 4) Enable free monitoring: we re-check daily and alert you if you get relisted.
A public database of IP addresses and domains associated with spam or malicious activity. Mail servers consult them in real time to filter incoming messages.
A blacklist listing is one of the main causes, along with misconfigured SPF/DKIM/DMARC. Check both: this test for blacklists, and our full check for your email authentication.
No — reputable lists (Spamhaus, SpamCop) offer free delisting once the cause is fixed. Beware of services charging for an « express delisting ».
Spamhaus ZEN and PSBL and SpamCop for your website's IP address, and Spamhaus DBL for the domain's own reputation. These are the lists most consulted by mail servers.
Yes, free and no signup. We only query public sources.