Blacklist Check

What are RBL/DNSBL blacklists?

RBL/DNSBL are databases of IP addresses identified as sources of spam or malware. Mail servers check these lists before accepting messages. Being listed can block email delivery.

We check Spamhaus ZEN, SpamCop, Barracuda, SORBS, CBL, UCEPROTECT, DroneRL, Blocklist.de — 31 lists in total.

What to do if you're listed?

Resolve the issue (secure your server, configure SPF/DKIM), then submit a delisting request on the list's website. Most lists remove entries automatically after activity stops.