Email Blacklist Monitoring

Get alerted the moment your domain or mail IP hits a blacklist — 52 DNSBLs, checked 24/7 and tiered so collateral listings never cry wolf. $5/mo vs mxtoolbox $129.

Free instant report · continuous monitoring from $5/mo · no account to check

What it monitors

52 DNSBLs, 24/7Spamhaus, SpamCop, Barracuda, CBL, SORBS and more — re-checked around the clock.
Web + mail IPsWe resolve your A and MX records and watch every IP your mail is sent from.
Tiered severityAuthoritative listings alert; collateral/ASN lists stay advisory so you get no false alarms.
Delisting guidanceEach alert links the offending list with the steps to request removal.
Deliverability contextPaired with SPF/DKIM/DMARC so you fix the cause, not just the symptom.
BundledBlacklist monitoring plus SSL, email auth, expiry and DNS — one plan.

How it compares

DHMmxtoolboxHetrixToolsMultiRBL
Blacklist (DNSBL) alerts ✓✓✓✗
Number of lists 52100+90+many
Tiered (no false alarms) ✓✗✗✗
SSL + email auth + DNS too ✓✓✗✗
Price $5/mo$129/mo$5–15/mofree/manual

Simple pricing

$5/mo

Solo — everything below, one domain. Free tier monitors 1 domain daily.

  • 52 DNSBLs checked across your web and mail IPs
  • Alerts only on authoritative lists — advisory ones stay quiet
  • 6-hourly blacklist re-checks
  • Plus SSL, SPF/DKIM/DMARC, expiry and DNS — all included
  • Delisting links and a weekly deliverability digest
Start with a free check

Frequently asked questions

What is email blacklist monitoring?

It repeatedly checks the IP addresses your mail is sent from against DNS blacklists (DNSBLs) that inbox providers consult, and alerts you the moment you are listed — before your email starts landing in spam or bouncing.

Why does mxtoolbox charge $129/month for this?

mxtoolbox bundles blacklist monitoring into higher tiers. We do the same 24/7 DNSBL alerting — across 52 lists, tiered so collateral listings do not spam you — for $5/month, with four more checks included.

How many blacklists do you check?

52, spanning the authoritative lists providers actually enforce (Spamhaus ZEN/SBL/XBL/PBL, SpamCop, Barracuda, CBL, SORBS, PSBL) plus secondary and advisory lists shown separately.

Will collateral listings spam me with alerts?

No. Aggressive lists that flag whole ASNs or netblocks are treated as advisory — they appear in your report but do not trigger alerts or dent your score, so you only hear about listings that actually hurt deliverability.

Is there a free plan?

Yes — monitor one domain free with a daily blacklist check. Solo ($5/mo) adds 6-hourly checks and more domains.