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FraudBL is an open source DNS Blacklist server, a part of the more common dnsbl.tornevall.org DNS Blacklist. FraudBL stands for Fraud Blacklist. This site itself is a landing page for Tornevall Networks blacklisting services and the real site, where most of our information resides can be reached via Tornevall Networks portal (which is currently under construction). The site itself has its roots in Sweden.
The purpose of FraudBL is about stopping fraudalent/phishinglike e-mail sent from different servers, that looks like they are sent from banks and others. FraudBL uses a separate spamresolver with the suffix bl.fraudbl.org. However, we are also using dnsbl.tornevall.org and hosts that is considered phishy/fraudalent are marked up with an extra TXT-entry.
To report fraudalent e-mail to us, send the mail content (important: with full header) to firstname.lastname@example.org. To extract a message header, you may see a few examples at http://docs.tornevall.net/x/ZoBq how to do this (covers gmail, outlook/hotmail/thunderbird/etc). The goal with this, is to block the server sources of the sent mail, not the sender itself, so it's actually the "Receved"-headers we are looking for primarilly.
Examples on where spoofed e-mail may come from: