Checks your domain and mail-sending IPs against Spamhaus, Barracuda, SORBS, and 15 other RBLs — alerts within minutes of a listing.
Quick answer
Lemwatch queries 18 major DNSBLs for your MX IPs and apex A records every 6 hours. Any listing raises a severity: high incident with the RBL name and delisting URL.
What it checks
Spamhaus SBL/XBL/PBL
Barracuda, SORBS, UCEPROTECT L1-3
SURBL, URIBL for URL-based lists
Historical listings (last 30 days) shown in a timeline
Where to find it in Lemwatch
Site details → Security → Reputation.
How to respond
Click through to the RBL's delisting form.
Fix the root cause (compromised mailbox, forwarder loop, malware) before requesting delisting.
Wait 24-72 hours for delisting to propagate.
Acknowledge once cleared.
FAQ
Why 18 lists and not 100?
Most obscure RBLs have poor accuracy — we curate to reduce false positives.