Email blacklist checker

Is your mail going to spam? Check your domain, or the IP address your mail is sent from, against the major email blocklists.

Good to know

What is an email blacklist?: A list (also called a DNSBL or blocklist) of IP addresses and domains that have sent spam or look compromised. Mail providers check it, and mail from listed addresses is often rejected or sent to spam.
How do I get delisted?: Fix the cause first: a hacked account, an open relay, a compromised website or a bad mailing list. Then follow the list's removal process on its website; many delist automatically after a while.
Why does it say “Couldn't check”?: Some lists refuse lookups from large or shared DNS servers, or didn't answer in time. Check those on the list's own website.

Checking by hand only tells you about right now. Spot Downtime checks your sites around the clock and alerts you by email, Slack or Discord.