Blacklist Check
Emails bouncing or landing in spam? Mail providers check senders against public blocklists of addresses caught sending spam. Enter an IP address or a domain, and we'll check it, and for a domain, its mail servers, against the lists that matter, with what each listing means and how to get off it.
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Not listed, but still landing in spam? Missing email settings are the more common cause. The Email Setup Checker tests SPF, DKIM, and DMARC, the records Gmail and Outlook require. Open Email Checker →A blocklist (or blacklist) is a public list of internet addresses caught sending spam, spreading malware, or behaving like infected computers. Mail servers look up every sender, and many refuse or junk mail from listed addresses.
Not every list matters equally. Spamhaus, Barracuda, and SpamCop are used by a large share of mail providers and filters; a listing there causes real problems. Smaller lists affect fewer people. Some, like UCEPROTECT, list entire networks and charge for quick removal; most big providers ignore them.
"Policy" isn't a spam listing. Spamhaus's PBL lists home and mobile internet connections that aren't meant to send email directly. Every home connection is on it, and that's fine: your email goes out through your provider's mail servers, not your home connection.
To get removed, fix the cause first: a hacked account, an infected computer, a form being abused to send spam. Then follow the removal link for each list. Most delist automatically within a day or two once the spam stops. Never pay for removal from a list big providers don't use.
Some lists refuse lookups that arrive through large shared DNS services; when that happens we say so and link to their own lookup page instead of guessing. Free use is limited to 30 checks per day.
