Free · without registration
DNSBL/RHSBL

Blacklist Check: Domain, IP & Mailserver Check

DNSBL/RHSBL and mail DNS verification. No Google Safe browsing test and no statement about rankings. MX-IP and actual shipping IP can be different.

Give them a Domain, IP or URL and then check them out. DNSBL/RHSBL blacklists, MX-IP(s), hits and reputation hints.

Tip: For delivery problems (mail) is usually the MX-IP Relevant, not the website IP.
Pro Tips (Blacklist)
  • A hit does not automatically mean “spam” – check which list and whether it is MX-IP Or website IP.
  • With CDN or shared hosting, a website IP can be used by several customers. Clarify the relation to your own service.
  • For hits: Check reputation, SPF/DKIM/DMARC, bounce rates and abuse.
What is being checked?
  • Input normalization: URL → Host, Domain → Host
  • DNS: A/AAAA IPs + MX hosts → IPs
  • IP checks: DNSBL queries per IP (multiple zones)
  • Domain Check: RHSBL/SURBL (Simplified Domain Check)
  • Result: Hits, Details, Score & Notes
Note: DNSBLs have some policies/rate limits. The tool uses server-side DNS queries and is designed for reasonable limits.
Result of the blacklist test
Score —
Ready
No exam has started yet.
verdict
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IPs found
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matches
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Risk exposure
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No risk classification yet.
In the case of mail problems, determine the actual shipping IP from mail headers or provider data and check it separately.
Targets
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Host/Domain and Resolved IPs (A/AAAA/MX).
Input input
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Host
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IPs (A/AAAA/MX)
Click to copy:
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Indications for improvement
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No exam has started yet.
Reputation and mail DNS classification
Prioritizes hits by website IP, MX IP, domain signal, SPF, DMARC and reverse DNS.
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Areas affected
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Why this classification?
No exam has started yet.
Mailserver / MX
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SPF/DMARC
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Reverse DNS
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Next steps by priority
After the check, concrete measures for mail, domain and infrastructure appear here.
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Details
Hits per IP/zone and domain RHSBL.
IP-DNSBL checks
Several DNSBL zones are queried per IP. Provider/resolver warnings are handled separately from real listings.
IP List Status Details
No data yet.
Domain RHSBL / SURBL
Simplified domain check (host + base domain). Not every list allows public queries.
Domain List Status Details
No data yet.

Correctly classify a listed MX-IP

Practical example · for illustration

Starting position

Example: The domain receives emails via an MX host; its IP appears in a DNSBL.

Classify the findings

This occupies a listing of the requested IP in this list. The MX host denotes the incoming mail path and does not have to be the outgoing shipping server.

Specific amendment

In the case of delivery problems, determine the actual sending IP from mail headers, bounce messages or provider details and check them separately.

Control and border

First clarify cause and shipping reference, then check with the list operator according to its procedure or delist. A DNSBL hit is not a Google Safe browsing or ranking finding.

What DNSBL and RHSBL hits say

The check queries configured DNS-based lists for IP addresses and domains and complements the mail DNS context. A hit applies to the respective destination, the respective list and the query time. Not every recipient page uses the same lists. Provider or resolver warnings are not confirmed listings.

MX is the incoming mail route

MX records name servers that receive emails for a domain. Outbound shipping can run through other IPs or an external shipping service. In case of delivery problems, determine the actual sending IP from a bounce message, the received headers of a delivered message or the mail provider and check it specifically.

No safe browsing or ranking test

DNSBL/RHSBL lists are not Google Safe Browsing. This tool does not check Google’s security alerts, manual actions or rankings. A hit on a shared hosting IP is therefore not proof that your website is dangerous or ranks worse on Google.

Resolve hits and re-check

List operators and affected IP or domain confirm, clarify causes such as compromised shipping or shared hosting problems and then consider the respective delisting procedure. SPF, DKIM and DMARC must match the actual shipment; the mere presence of DNS records does not guarantee delivery.

Questions about use and boundaries

Is a listed MX-IP my shipping IP?

Not mandatory. MX refers to the incoming mail route. The actual sending IP must be determined on the basis of mail headers, bounce messages or provider information.

Does the tool Google Safe Browsing check?

No. DNSBL and RHSBL lists as well as mail DNS are checked. This does not lead to any statement about Google security warnings or rankings.

Does no hit mean that every email is delivered?

No. Only the configured, successfully queried lists were checked. Recipient filters, shipping behavior and authentication can additionally influence delivery.

For the next check: Save this free tool in the browser as a bookmark (Ctrl+D or ➳D).