The TechTheft Virus Blacklist is an IP-based blocklist that automatically adds machines infected with viruses, scanning with known viral signatures, or spreading viral content, making it a critical (blacklist) to monitor.
The TechTheft Virus Blacklist (virus.bl.techtheft.info) is a private, internal IP address based blacklist. It's not a public list that anyone can query; access is by invitation only to trusted subscribers. The list's policy is to "block on sight".
This blocklist automatically adds IP addresses that it detects are involved in malicious viral activity. According to its documentation, this includes:
Nominations are not accepted for this blacklist, as additions are made automatically based on data from their own spam and attack traps.
The blacklist is operated by an organization called TechTheft. Their mission is to combat what they call "Hi-Technology Theft", which includes viral attacks, spam, DDoS attacks, and IP or PC hijacking. They operate as a collaboration point for administrators and security enthusiasts who want to fight technology abuse.
The group's philosophy is aggressive. They advocate for an "Internet Death Penalty" against sources and supporters of abuse, believing that simply filtering malicious content is insufficient. Their goal is to stop attacks at the source by blocking offending machines and networks entirely, preventing them from communicating on the internet.
Removal from the TechTheft Virus Blacklist can happen in two ways. The primary method is automatic delisting, which occurs five days after the last time the malicious activity was detected from your IP address. It is also possible to make a manual request, which can reduce the quarantine period to 24 hours.
Before requesting delisting from any blocklist, it's crucial to resolve the underlying issue that caused the listing. You should:
Since this is a private list, there is no public delisting form. Removal is tied directly to resolving the reported complaints and stopping the malicious activity.
The impact of being on the TechTheft Virus Blacklist is considered low for most senders. Because this is a private blacklist (or blocklist), its use is limited to subscribers who have been granted access. Your email deliverability will only be affected if you are sending to a recipient whose organization subscribes to and uses this specific list.
Unlike major public blocklists that are used by thousands of mail providers, a listing here will not cause widespread delivery issues. However, if your key recipients use this blacklist, the impact could be significant for that specific communication channel.
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
Organization
Zone
Type
Impact
Delisting
19 resources
Do blacklists exist for newly registered domain names?
Should I use blacklist or blocklist in email marketing?
What are examples of insignificant or ineffective email blocklists?
Should I worry about being on UCEPROTECTL2 or UCEPROTECTL3 blocklists?
What is the impact of being on the UCEPROTECTL3 blacklist and how to deal with it?
What are the best blocklist monitoring services that offer timely alerts and customization options?