Some EFNET irc-server has started using a Tor blacklist. From http://www.sectoor.de/tor.php: "Since nobody can control which ports are allowed on the exit servers (the tor project itself denies smtp by default, but this can be changed) it's a potential risk that someone abuses the tor network to hide his ip while he's spamming around. [...] Currently we list two types of hosts: - IPs running a tor server itself - Class C Networks they include a tor server [...] To protect yourself or your service against abuse from tor users, you can use our DNSBL. Currently we just see some use of this list for a few services like IRC Networks using BOPM. Since only a few nodes allow outgoing SMTP connections, the usage of this list by smtp servers is probably low." /Thomas --
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