The TechTheft Conferr Blacklist is a private IP-based blocklist that automatically lists IP addresses with missing or broken DNS records based on server and firewall logs to prevent network abuse.
The TechTheft Conferr Blacklist is an IP-based blocklist that operates automatically based on server and firewall logs. Its zone is conferr.bl.techtheft.info. According to its operators, this is a private blacklist intended for internal use by trusted subscribers, and subscriptions are by invitation only.
The primary reasons for an IP address being added to this blocklist (blacklist) are purely technical. The list targets IPs with configuration issues, specifically those that have no Reverse DNS (rDNS) records or have broken DNS configurations. The stated purpose of the list is to "Block for clear access", suggesting it's used as a filter to reject connections from misconfigured servers.
The blocklist is run by an organization called TechTheft. Their mission is to combat what they term "Hi-Technology Theft," which includes spam, viral attacks, DDoS attacks, and IP hijacking. They advocate for an aggressive approach to fighting abuse, aiming to stop malicious activity at the source rather than simply filtering it. TechTheft positions itself as a collaboration point for administrators and security enthusiasts who want to actively participate in preventing technology abuse.
Removal from the TechTheft Conferr Blacklist can happen automatically, as IPs are re-tested at irregular intervals. However, you can also request a manual re-test. Before you request delisting, you must ensure you have resolved the underlying issues that led to the listing.
Follow these steps to resolve your listing:
The impact of being listed on the TechTheft Conferr Blacklist is generally low. Because it is a private blocklist available only to a select group of subscribers by invitation, it is not widely used across major mailbox providers. However, if you are listed, you will experience deliverability issues when sending emails to any organization that subscribes to this specific blacklist. While the overall impact is limited, it can be significant for senders trying to reach those specific domains.
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