How to check if your email domain is blacklisted
- Enter your email domain above, the part after the @ in your address (for example yourcompany.com), and press check.
- Read the summary. We test the domain itself and the IP addresses of your mail server and website. Any listing is shown in red with the name of the blacklist.
- Open each listing to see why it matters and the link to that list's removal page.
A clean result means your domain and mail server IPs are not on any of the public blacklists we check. If your emails still land in spam, the cause is usually missing SPF, DKIM or DMARC records, which the domain health check tests in the same way.
Signs your email domain may be blacklisted
- Emails bounce with errors such as 550 5.7.1, "blocked using" or "listed in" followed by a blacklist name like Spamhaus or Barracuda.
- Messages that used to arrive now go to spam for many different recipients at once.
- Your hosting or email provider tells you an account has been sending spam, often from a hacked mailbox or website form.
Gmail and Outlook also use their own reputation systems. For those, free tools such as Google Postmaster Tools and Microsoft SNDS show how your domain and IPs are rated.
How the blacklist check works
Blacklists (also called DNSBLs or RBLs) are lists of IP addresses and domains that have sent spam or look compromised. Mail servers query them for every incoming message. If your IP is listed, your emails bounce or go straight to spam.
Enter your domain and we look up its MX records, find the IP address of your mail server and website, and query each one against more than 45 IP blacklists at the same time. The domain itself is also checked against domain blacklists such as Spamhaus DBL, SURBL and URIBL, which matter for links inside your emails.
What to do if you are listed
- Find the cause. A hacked mailbox or website sending spam, an open relay, missing reverse DNS, or a shared IP that someone else abused.
- Fix it first. Change passwords, remove malware, close the relay, set reverse DNS. Delisting before fixing just gets you listed again.
- Request removal. Most major lists (Spamhaus, SpamCop, Barracuda) have a self-service removal page, and many expire listings automatically once spam stops.
- Re-check here after the removal is confirmed.
Listed on a website IP only?
If the listed IP only hosts your website and not your mail, email is usually unaffected, but it can hint that the server or a neighbour on shared hosting is sending spam. We mark these as warnings, not errors.