Polspam Dynamic IP Blacklist (BL)
The Polspam Dynamic IP blacklist (or blocklist) identifies dynamic IP addresses and sources commonly used for sending unsolicited email.
Updated on 18 Jun 2026: We updated this guide with the current Polspam dynamic IP zone details and a direct DNS check example.
Summarize with
Check if you are listed on Polspam Dynamic IP Blacklist (BL)
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 Polspam Dynamic IP Blacklist (BL)?
The Polspam Dynamic IP Blacklist (BL) is a Polish Real-time Blackhole List (RBL) created to help fight spam. Its dynamic IP zone, bl-h4.rbl.polspam.pl, lists IPv4 addresses associated with dynamic ranges and similar sources often exploited for unsolicited email. A listed IP in this zone returns 127.0.2.4. This blacklist is designed for spam filtering software, such as SpamAssassin, allowing administrators to assign a score to incoming mail rather than outright rejecting it.
Polspam also runs the broader bl.rbl.polspam.pl IPv4 blacklist and other hardened zones. The operators advise caution with lists that include the letter "h" in their name, as they can be very restrictive. They recommend using these specific blocklists only within a spam filter to avoid blocking legitimate emails. The purpose of this blocklist is not to prevent mail delivery but to provide a data point for mail servers to make more informed decisions about which emails are likely spam.
Who runs Polspam Dynamic IP Blacklist (BL)?
Polspam is a community-driven, non-commercial project run as a hobby. It is a Polish RBL server based on cooperation with the general internet community. The organization does not accept donations, engage in commercial activities, or have any sponsors. It is an informational tool to report on domains and IPs known for spamming, based on reports from volunteers. It does not provide any electronic services in a legal sense and emphasizes that its purpose is to help make life difficult for spammers.
How to check a Polspam Dynamic IP Blacklist (BL) listing
To check whether an IPv4 address is listed in the dynamic IP blacklist, reverse the IP octets and append bl-h4.rbl.polspam.pl. For example, the IP 1.2.3.4 becomes 4.3.2.1.bl-h4.rbl.polspam.pl.
DNSBL query examplebash
nslookup 4.3.2.1.bl-h4.rbl.polspam.pl
A listed address returns 127.0.2.4. No answer means that the queried IP is not listed in this specific dynamic IP zone, although it can still appear in another Polspam blacklist or blocklist.
How do I get removed and delisted from Polspam Dynamic IP Blacklist (BL)?
The delisting process for this blacklist is manual and follows a strict policy. Polspam does not delist domains considered to be notorious spammers. A delisting from the blocklist is only considered for one-off incidents that are believed to be unintentional. An IP address is usually listed because of a domain hosted on it; the IP address itself cannot be delisted independently. Once the offending domain is no longer sending spam, the host IP address is removed from the blacklist automatically after seven days without any intervention.
Shared hosting adds another layer of investigation. Many domains can share one IP address, and one spamming domain can damage the reputation of every other domain on that IP. If your own domain is clean but the IP is listed, ask the hosting provider to identify the domain that caused the listing and remove or fix the source of the spam.
To request removal, you must send an email in plain text format. Emails in HTML or containing scripts, remote graphics, logos, or tracking elements will be ignored. Before requesting delisting, you must investigate and be prepared to honestly describe the situation.
Your email must include the following information:
- Domain name.
- The IP address of the domain.
- A detailed and honest description of why you suspect the domain was listed. Lying will result in your request being dismissed.
- Do not include a personal signature; the correspondence is treated as domain-to-domain.
- A clear request that Polspam treats the message as a domain communicating with another domain.
Polspam provides extensive examples of what a truthful confession looks like, covering scenarios including direct spamming, outsourced spam, warmed-up infrastructure, tracking in HTML email, and hosting provider negligence. Honesty is paramount, as the history of a domain is easily verifiable. If you are a hosting provider, you are expected to check all domains and subdomains you host to find the source of the spam.
What's the impact of being listed on Polspam Dynamic IP Blacklist (BL)?
The impact of being listed on the Polspam Dynamic IP Blacklist (BL) is usually low to moderate. This blacklist does not directly block or ban email delivery. Instead, it is an advisory list. Mail server administrators who use this blacklist (or blocklist) configure their own systems to use the listing as a factor in scoring incoming emails. An email from a listed dynamic IP can be marked as spam, moved to a junk folder, or rejected if the recipient's mail server has aggressive rules. The impact is primarily concentrated on recipients whose mail servers use this specific Polish RBL, so deliverability issues are most noticeable when sending to Polish domains or organizations that rely on Polspam data.
Other Polspam Dynamic IP Blacklist (BL) blocklists
Polspam Blacklist (BL)
Organization
Polspam
Zone
bl.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 Danger Blacklist
Organization
Polspam
Zone
rhsbl-danger.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
