| Name | Comment |
| Anti-Spam Look Up | Uses a half dozen other DNS based block lists including Outblaze's own local list, which blocks known dialup IP ranges and other dynamic IP blocks |
| Blitzed Open Proxy Monitor List | The Blitzed Open Proxy Monitor List is a DNS-based list of machines believed to run insecure proxies. |
| Composite Block List | The CBL takes its source data from very large spamtraps, and only lists IPs exhibiting characteristics which are specific to open proxies of various sorts (HTTP, socks, AnalogX, wingate etc) which have been abused to send spam, worms/viruses that do their own direct mail transmission, or some types of trojan-horse or "stealth" spamware, without doing open proxy tests of any kind. |
| McFadden Associates E-Mail Blacklist | As a public service, McFadden Associates maintains free DNSBL SPAM blacklists. Any servers sending SPAM through our mail filters will be automatically added for a period of thirty days or until removal is requested via this website. |
| Open Relay Database | ORDB.org is a non-profit organization which stores a IP-addresses of verified open SMTP relays. These relays are, or are likely to be, used as conduits for sending unsolicited bulk email, also known as spam. |
| Passive Spam Block List | Uses Spamikaze to detect spammers. Allows anyone to remove an IP address from the list. IP addresses in the list timeout after a set period. |
| SORBS | Fighting spam by finding and listing exploitable servers |
| Spamhaus | Spamhaus tracks the Internet's Spammers, Spam Gangs and Spam Services, provides dependable realtime anti-spam protection for Internet networks, and works with Law Enforcement to identify and pursue spammers worldwide. |
| Trend Micro's Network Reputation Services | Trend Micro Incorporated list. |