A. Realtime Blackhole Lists

Here we list the RBL providers used for the tests performed on Section 4.1.

• Group 1:
  1. Open Relay Database (ORDB),
     www.ordb.org

• Group 2:
  1. Spamhaus,
     www.spamhaus.org
  2. Blitzed Open Proxy Monitor List,
     https://opm.blitzed.org
  3. Relays.Osirusoft.com,
     https://relays.osirusoft.com

• Group 3:
  1. Spamhaus,
     www.spamhaus.org
  2. Blitzed Open Proxy Monitor List,
     https://opm.blitzed.org
  3. Relays.Osirusoft.com,
     https://relays.osirusoft.com
  4. Open Relay Database (ORDB),
     www.ordb.org
  5. Not Just Another Bogus List,
     https://dnsbl.njabl.org/
  6. Extreme Spam Blocking List (xbl),
     https://xbl.selwerd.cx/
  7. Fiveten,
     www.five-ten-sg.com/blackhole.php
  8. Spamcop Blocking List,
     https://spamcop.net/bl.shtml
  9. Distributed Server Boycott List (DSBL),
     https://dsbl.org/main