TechTheft Virus Blacklist
TechTheft Virus is an IP-based blocklist (blacklist) tracking machines infected with viruses. Monitor this list to protect your email deliverability via Suped.
Updated on 17 Jun 2026: We updated this guide to explain how to confirm a private TechTheft Virus listing, clean up malware-driven IP problems, and separate IP reputation issues from DMARC authentication failures.
Summarize with
Check if you are listed on TechTheft Virus 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 TechTheft Virus Blacklist?
The TechTheft Virus Blacklist (virus.bl.techtheft.info) is a private, internal, IP-based blocklist (blacklist). It is not a public list that anyone can query. Access is by invitation only for trusted subscribers, and the list's policy is to "block on sight".
This blacklist automatically adds IP addresses that its traps detect in malicious viral or malware activity. According to its documentation, this includes:
- IPs of machines infected with viruses or similar malware.
- IPs of machines scanning networks with known viral signatures.
- Any IP address spreading viral material or sending active viral content.
- IPs connected to domains that act as download points for viral content.
Nominations are not accepted for this blacklist, as additions are made automatically from TechTheft's spam and attack traps.
Who runs TechTheft Virus Blacklist?
The blacklist is operated by TechTheft, an organization focused on what it calls "Hi-Technology Theft". Its published scope includes viral attacks, spam, DDoS attacks, and IP or PC hijacking. The group describes itself as a collaboration point for administrators and security enthusiasts who fight technology abuse.
The group's policy stance is aggressive. It advocates for an "Internet Death Penalty" against sources and supporters of abuse, with the goal of blocking offending machines and networks entirely instead of filtering individual messages after they arrive.
How to confirm a TechTheft Virus listing
Because TechTheft Virus is private, a sender normally cannot confirm a listing through a public DNSBL query. Treat it as a recipient-specific rejection until mail logs, bounce messages, or the recipient's postmaster confirm that TechTheft data caused the block.
- Check SMTP rejection text for virus.bl.techtheft.info, TechTheft, malware, virus, infected host, or "block on sight" wording.
- Match the rejection to the sending IP, not only the sending domain. This blacklist is IP-based, so shared infrastructure can affect more than one domain.
- Compare the timing with malware alerts, outbound traffic spikes, unexpected scans, or abuse complaints tied to the same IP.
- Use Suped's DMARC reporting to confirm whether SPF, DKIM, and DMARC are passing while you investigate the IP reputation issue. Suped does not query this private blacklist directly, but it helps separate authentication failures from a malware-driven block.
How do I get delisted from TechTheft Virus Blacklist?
Removal from the TechTheft Virus Blacklist can happen in two ways. The primary method is automatic delisting five days after the last detected malicious activity from the IP address. A manual request can reduce the quarantine period to 24 hours, but only after the abusive traffic has stopped.
Before requesting delisting from any blocklist (or blacklist), fix the issue that caused the listing. You should:
- Find and stop the source of malicious traffic, such as a compromised computer, misconfigured server, infected device, or abused script on the network.
- Clean the host, patch software, rotate exposed credentials, and confirm that outbound scanning or viral traffic has stopped.
- Keep an active abuse contact, such as abuse@yourdomain.com, and respond to reports quickly enough to show that the complaint has been handled.
Since this is a private list, there is no public delisting form. Removal is tied to resolving reported complaints and stopping the malicious activity.
What is the impact of being listed on TechTheft Virus Blacklist?
The impact of being on the TechTheft Virus Blacklist is low for most senders. Because this is a private blacklist (or blocklist), use is limited to subscribers who have been granted access. Email deliverability is affected when you send to a recipient whose organization subscribes to and enforces this specific list.
A listing here does not normally create widespread delivery failures. For a key recipient that uses this blacklist, the impact is direct: messages from the listed IP can be rejected until the infected host or malware source has been remediated and the listing ages out or is manually reduced.
Other TechTheft Virus Blacklist 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 Other Blacklist
Organization
TechTheft
Zone
other.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 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
