Email Blacklist Checker

Check if your IP address or domain is listed on major email blacklists (RBLs). Being blacklisted can cause your emails to be rejected or sent to spam.

What are email blacklists?

Email blacklists (also called RBLs or DNSBLs) are databases of IP addresses known to send spam. Mail servers check these lists when receiving email — if your sending IP is listed, your messages may be rejected or routed to spam folders.

Common reasons for being blacklisted include sending unsolicited emails, having a compromised server, poor list hygiene, or sharing an IP with a spammer on a shared hosting platform.

If you find your IP is listed, most blacklists offer a delisting process. Fixing the underlying issue (cleaning your list, securing your server) is essential before requesting removal.

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