TechTheft Other Blacklist
The TechTheft Other blocklist (or blacklist) identifies IPs for port scanning, not spam. Use it for scoring email, avoiding high collateral damage.
Updated on 17 Jun 2026: We updated this guide with clearer removal steps and practical investigation checks for private TechTheft listings.
Summarize with
Check if you are listed on TechTheft Other 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 TechTheft Other blacklist?
The TechTheft Other blacklist is a private, automatically managed IP-based blocklist. It lists IP addresses tied to generally malicious network behavior detected through server and firewall logs. This blacklist (or blocklist) is not focused on traditional spam activity. It covers other forms of network abuse, including port scans, malformed protocol traffic, and activity that does not fit expected service behavior.
According to its operators, the policy is to automatically list IPs for actions like scanning unusual ports or sending data that violates standard protocols. Because the criteria are broad and automated, the list has a high risk of collateral damage and false positives. Its intended use is scoring or tagging inbound mail, not outright blocking. Access to this blacklist is private and by invitation only.
TechTheft's broader policy can affect infrastructure associated with:
- Email sources and mail servers
- DNS nameservers
- Network IP blocks
- Website hosts
- Virus-infected machines
- Web crawling agents
Who runs the TechTheft Other blacklist?
The blocklist is run by an organization called TechTheft. TechTheft describes its mission as combating "Hi-Technology Theft," including viral attacks, spam, DDoS attacks, and IP or PC hijacking. Its operating view is that persistent abuse needs source-level action rather than only message filtering.
TechTheft's philosophy comes from the history of other anti-spam efforts. It argues that early open-source blocklists became vulnerable to legal action, while later anonymous systems were too slow to counter collaboration between spammers and virus writers. In response, TechTheft advocates for what it calls an "Internet Death Penalty" against sources and supporters of abuse. The goal is to cut off malicious activity at its source rather than only filtering the resulting traffic.
How to get removed from the TechTheft Other blacklist
Removal from the TechTheft Other blacklist has both automatic and manual pathways. An IP address is automatically removed from the blacklist 120 days after the last malicious activity was detected.
For a manual removal request, the quarantine period can be reduced to 15 days. Before requesting delisting, fix the behavior that caused the listing. If the abusive behavior continues after manual removal, the IP address will be added back to the blocklist. There is no public delisting form; the process depends on resolving the underlying network abuse.
- Confirm the exact listed IP address, not only the domain or sending hostname.
- Ensure a working abuse contact, such as abuse@yourdomain.com, exists for the domain and IP address.
- Monitor that abuse contact and act quickly on network abuse complaints.
- Resolve all active complaints related to the IP before seeking review.
How to investigate a TechTheft Other listing
Treat a TechTheft Other listing as a network-abuse investigation first and an email deliverability incident second. The trigger is usually non-mail behavior, so changing SPF, DKIM, or DMARC records alone will not clear the underlying cause.
Use mail logs, firewall logs, IDS alerts, provider abuse notices, and hosting records to identify the listed IP, timestamp, and traffic pattern. If Suped's product is part of the workflow, keep the blocklist event beside DMARC, bounce, and complaint data so the email team can separate authentication failures from host compromise or scanning activity.
- Check whether the IP is shared, leased, cloud-assigned, or used by more than one internal service.
- Look for outbound port scans, repeated connections to unusual ports, malformed SMTP or HTTP traffic, open proxies, and compromised scripts.
- Review NAT, container, VPN, and load balancer logs so one internal host is not hidden behind the external IP.
- Keep remediation evidence, such as abuse ticket IDs, firewall rule changes, malware cleanup notes, and provider closure confirmations.
- Keep mail flowing only when authentication, bounce, and complaint signals remain clean; otherwise isolate the affected traffic until the abuse source is fixed.
What is the email impact of a listing?
The direct impact of being on the TechTheft Other blacklist is usually limited. It is a private list available only to invited subscribers, not a public blacklist that any mail server administrator can freely use to filter email.
The operators state that the blocklist should only be used for tagging messages or scoring because of the high risk of "collateral damage" and false positives. They advise against using it to block emails outright. Where a subscriber uses it in scoring, a listing can contribute to spam-folder placement rather than a hard SMTP rejection. That limits its impact compared with a public DNSBL used for direct blocking.
Other TechTheft blocklists
TechTheft Bad Whois Blacklist
Organization
TechTheft
Zone
bad.whois.bl.techtheft.info
Type
Domain
Impact
Inactive
Delisting
Manual
TechTheft Blacklist
Organization
TechTheft
Zone
bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Bogon Blacklist
Organization
TechTheft
Zone
bogon.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Conferr Blacklist
Organization
TechTheft
Zone
conferr.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Domain Blacklist
Organization
TechTheft
Zone
domain.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Expanded Blacklist
Organization
TechTheft
Zone
expanded.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft ISP Blacklist
Organization
TechTheft
Zone
isp.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Nana Blacklist
Organization
TechTheft
Zone
nana.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Robot Blacklist
Organization
TechTheft
Zone
robot.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Scanning Blacklist
Organization
TechTheft
Zone
scanning.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Source Blacklist
Organization
TechTheft
Zone
source.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Support Blacklist
Organization
TechTheft
Zone
support.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Virus Blacklist
Organization
TechTheft
Zone
virus.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Watchlist Blacklist
Organization
TechTheft
Zone
watchlist.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Web Blacklist
Organization
TechTheft
Zone
web.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
