SORBS vs Tor and the world

Mike Cardwell tor at
Mon Jan 7 23:06:32 UTC 2008

Nick Mathewson wrote:

> On the other hand, if your only goal is to block anonymous SMTP, and
> you agree that blocking all Tor servers is very overreaching, you
> might instead try looking at the more targetted DNSEL service
> available at
> It lets you block _exactly_ those servers that relay traffic on given
> ports to your address.  For a more thorough rationale, and a fairly
> detailed spec of how to make a compatible implementation, see

For reference, one might use this list in an ACL chunk in Exim4 as follows:

deny dnslists = 
      message  = $sender_host_address is running a Tor exit node that 
exits to $interface_address:$interface_port


More information about the tor-talk mailing list