Polspam RHSBL RBL Danger Blacklist
The Polspam RHSBL is a domain-based blocklist (blacklist) used to identify dangerous domains linked to activities like phishing and gambling.
Updated on 18 Jun 2026: We updated this guide to clarify RHSBL Danger checks, return codes, and Polspam's stricter delisting rules.
Summarize with
Check if you are listed on Polspam RHSBL RBL Danger Blacklist
And 143 other blocklists.
Spamhaus
0Spam
Cisco
NoSolicitado
URIBL
abuse.ro
ALPHANET
Anonmails
Ascams
BLOCKEDSERVERS
Calivent Networks
EFnet
JustSpam
Kempt.net
NordSpam
RV-SOFT Technology
Scientific Spam
Spamikaze
SpamRATS
SPFBL
Suomispam
System 5 Hosting
Team Cymru
Validity
www.blocklist.de Fail2Ban-Reporting Service
ZapBL
2stepback.dk
Fayntic Services
ORB UK
technoirc.org
TechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftWhat is the Polspam RHSBL RBL Danger blacklist?
The Polspam RHSBL RBL Danger blacklist is a domain-based blocklist (blacklist) for domains Polspam classifies as dangerous. Polspam describes this zone as covering dangerous domains such as gambling and phishing domains. It operates on the DNS zone rhsbl-danger.rbl.polspam.pl. The listed response for this zone is 127.0.0.5. Mail server administrators who use this list are advised by Polspam to reject matching mail or apply a very high spam score.
It is one of several Polspam RHSBL zones and one of the strictest. An RHSBL is a right-hand side DNSBL, so it checks domain names seen in message content, headers, reverse DNS, or related hostnames rather than only the sending IP address.
- This zone lists domain names, not only IP addresses.
- A positive DNS lookup returns 127.0.0.5.
- Polspam recommends rejection or a very high antispam score for matches.
- Because it is restrictive, test the effect in scoring before using it for hard rejects across all mail.
Who runs Polspam RHSBL RBL Danger blacklist?
Polspam RHSBL RBL Danger blacklist is operated by Polspam, a Polish RBL server project. Polspam describes itself as a hobby project built by a community, not a commercial service. Its stated purpose is to publish spam-related domain, IP, address-class, and ASN information for mail administrators.
Polspam says it does not accept donations or sponsorships and does not run commercial activity. It also states that it does not collect personal data for delisting correspondence and asks senders to keep requests focused on the technical facts of the listing.
How to check a Polspam RHSBL Danger listing
Query the domain by appending it to rhsbl-danger.rbl.polspam.pl. A listed domain should return 127.0.0.5. If there is no DNS answer, NXDOMAIN, or no matching A record, the domain is not listed in that specific zone at the time of the lookup.
DNS lookup examplebash
nslookup example.com.rhsbl-danger.rbl.polspam.pl # Listed response: 127.0.0.5
Run the check for the exact domain that appears in mail or links. If you operate hosting, also review the sender domain, SMTP hostnames, MX hostnames, landing-page domains, and domains in message links, since RHSBL listings can follow domains that do not send mail directly.
How do I get removed from Polspam RHSBL RBL Danger blacklist?
The delisting process needs careful reading because Polspam treats the Danger zone more severely than its standard lists. For general Polspam blocklists, removal is reserved for one-off incidents believed to be unintentional. For rhsbl-danger, Polspam's hosting guidance says nomination to this list disqualifies a domain from unsubscribing from Polspam blacklists, and deletion requests for this list are ignored.
If your issue involves a related Polspam list rather than rhsbl-danger, send a plain-text request only after fixing the cause. HTML mail, scripts, tracking pixels, remote-loading logos, and short explanations will be ignored.
- Include the domain name and its IP address.
- Describe the suspected listing cause in detail.
- Explain whether spam was sent directly, outsourced, routed through another domain, or tied to landing pages.
- State what changed so the behavior stops, including client removal, account suspension, compromised-site cleanup, or hosting separation where relevant.
- For domains involved in mail, fix DMARC with p=reject, working DKIM, SPF ending in -all, and TLS 1.2 or higher.
- Keep individual emails free of recipient-tracking objects and make sure related websites use HTTPS.
If a shared IP address is on a Polspam IP blacklist because of your domain, your actions affect other domains on that IP. If you are a hosting provider, investigate every hosted domain and subdomain. Once the spamming domains are removed, the host IP address is automatically delisted after 7 days.
What's the impact of being listed on Polspam RHSBL RBL Danger blacklist?
The impact is low to moderate for many senders, but it rises when recipients use Polspam data in their filtering, especially in Poland and nearby European networks. Because this is an RHSBL, the effect is tied to the listed domain and related hostnames rather than only the outbound IP address.
Polspam says it does not block or ban mail itself. It publishes listing data, and receiving administrators decide whether to reject a message, increase its spam score, or route it to the junk folder. The practical result for a sender is poorer email deliverability and weaker domain reputation at receivers that trust this blacklist (blocklist).
Other Polspam RHSBL RBL Danger blacklist blocklists
Polspam Blacklist (BL)
Organization
Polspam
Zone
bl.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Dynamic IP Blacklist (BL)
Organization
Polspam
Zone
bl-h4.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 1 Blacklist (BL)
Organization
Polspam
Zone
bl-h1.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 2 Blacklist (BL)
Organization
Polspam
Zone
bl-h2.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 3 Blacklist (BL)
Organization
Polspam
Zone
bl-h3.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Blacklist
Organization
Polspam
Zone
rhsbl.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Hard Blacklist
Organization
Polspam
Zone
rhsbl-h.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Very Hard Blacklist
Organization
Polspam
Zone
rhsbl-v.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam Wrong Reverse Blacklist (BL)
Organization
Polspam
Zone
bl-h5.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
