RV-SOFT Technology RVS-TECH DNSBL
The RV-SOFT Technology RVS-TECH DNSBL is an IP-based blocklist (blacklist) that automatically delists sources when unwanted email reports cease.
Updated on 17 Jun 2026: We added direct DNS lookup guidance and tightened the delisting steps for RVS-TECH DNSBL.
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Check if you are listed on RV-SOFT Technology RVS-TECH DNSBL
And 143 other blocklists.
Spamhaus
0Spam
Cisco
NoSolicitado
URIBL
abuse.ro
ALPHANET
Anonmails
Ascams
BLOCKEDSERVERS
Calivent Networks
EFnet
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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 RV-SOFT Technology RVS-TECH DNSBL?
The RV-SOFT Technology RVS-TECH DNSBL is a DNS-based blacklist (blocklist) that lists IPv4 addresses reported for unwanted or abusive email. Its DNS zone is dnsbl.rv-soft.info, and the list is used as an RBL/DNSBL by internet service providers and system administrators that choose to query it during SMTP filtering.
The list is compiled from reports and detection sources, including automated systems and user submissions of spam. A listing can point to an open relay, open proxy, compromised host, malware-related activity, phishing, poor RFC compliance, or a general reputation problem.
A key feature of this blocklist is its time-based delisting. When the unwanted mail stops, the listing should expire automatically instead of requiring a manual removal request. When a mail server checks an IP address against this DNSBL, the response uses a 127.0.0.x return code that indicates the reason for the listing.
RVS-TECH DNSBL return codes:
- 127.0.0.2: Open relay
- 127.0.0.3: Open proxy
- 127.0.0.4: Spam source
- 127.0.0.5: Malware domain
- 127.0.0.6: Phishing messages
- 127.0.0.7: Spear phishing messages
- 127.0.0.8: Fraudulent or hoax messages
- 127.0.0.9: Blackmail messages
- 127.0.0.10: Spam from an end-user device or local PC
- 127.0.0.11: Non-RFC compliant behavior
- 127.0.0.12: Does not properly handle 5xx errors
- 127.0.0.13: Compromised system - DDoS
- 127.0.0.14: Compromised system - relay
- 127.0.0.15: Compromised system - proxy
- 127.0.0.16: Compromised system - autorooter or scanner
- 127.0.0.17: Compromised system - mass-mailing virus
- 127.0.0.18: Compromised system - mass-mailing phishing
- 127.0.0.19: Bad reputation
- 127.0.0.20: Mass distribution
Who runs RV-SOFT Technology RVS-TECH DNSBL?
The RV-SOFT Technology RVS-TECH DNSBL is operated by RV-SOFT Technology, an organization based in the Czech Republic, EU. They manage the DNSBL infrastructure, listing data, and automatic expiry behavior for this blacklist (blocklist).
How to check an RVS-TECH DNSBL listing
Check the IP directly with a DNS query. Reverse the IP address, append dnsbl.rv-soft.info, and query the A record. A positive result returns one of the 127.0.0.x codes listed above.
For example, to check 1.2.3.4, query 4.3.2.1.dnsbl.rv-soft.info.
DNS lookup examplebash
dig +short 4.3.2.1.dnsbl.rv-soft.info A
A blank response normally means the IP address is not listed in that DNSBL at the time of the lookup. A 127.0.0.x response means the IP is listed, and the final number explains the category of the report.
How do I get delisted from RV-SOFT Technology RVS-TECH DNSBL?
Removal from the RV-SOFT Technology RVS-TECH DNSBL is automated. There is no public manual delisting form for this DNSBL. The system is time-based, so an IP address is removed after the reports or detections that caused the listing stop.
To get delisted, fix the cause first. Waiting without stopping the traffic can lead to the same IP address being listed again.
- Use the return code to determine whether the listing is tied to spam, an open relay, an open proxy, phishing, malware, non-RFC behavior, or a compromised host.
- Pause suspicious campaigns, infected accounts, and unexpected SMTP traffic until you confirm the source.
- Clean affected hosts, rotate passwords and API keys, remove unauthorized mail scripts, and update software.
- Disable open relay behavior, close open proxy access, and fix 5xx handling or other RFC compliance issues.
- Check SPF, DKIM, and DMARC alignment for your domain so unauthorized senders do not keep creating reputation problems. Suped's product can help map legitimate senders through DMARC aggregate reports while you clean up the IP-level issue.
- Query the DNSBL again after the source is fixed. A blank response normally means the IP address is no longer listed.
What is the impact of being listed on RV-SOFT Technology RVS-TECH DNSBL?
The impact of being listed on RV-SOFT Technology RVS-TECH DNSBL is usually low compared with larger blocklists and blacklists. It is not used by every mailbox provider, but any receiver that checks this DNSBL can reject the message, add an SMTP block, route it to spam, or assign a lower reputation score.
Treat the listing as a signal that something in your sending environment needs review, especially when the return code points to a compromised system, open relay, phishing, or non-RFC behavior. Fixing the underlying issue matters more than waiting for automatic expiry.
