Blacklist check
See whether an IP address or domain is listed on the DNS blacklists that mail servers use to reject spam.
What we query
IP addresses are checked against IP-based lists (Spamhaus ZEN, Barracuda, SpamCop and more). Domains are checked against domain lists such as Spamhaus DBL and SURBL.
Why it matters
A single listing on a major list can block a large share of your outgoing mail. Listings often point to a compromised account or misconfigured server.
Listed?
Fix the cause first, then use each list's delisting link in the results. Read the guide.