Relays.osirusoft.com is first and foremost, an automated system designed to protect its users from open relay UCE (ie spam sent through unsecured mail servers). However, it also includes the contents of several other DNSBL lists, including SPEWS, SpamSites.org and the Spamhaus SBL.
(Inputs) This is an automated system designed to list unsecured mail servers that are often abused in order to send spam. In other words, it contains just the open relay bits of relays.osirusoft.com.
SPEWS is a listing mostly of sites that knowingly support or facilitate spam, or are connected to those who do. The people behind SPEWS are famous for being anonymous. SPEWS is often considered an "aggressive" DNSBL list, and brings an increased chance of legitimate mail being mistaken for spam.
SpamSites.org lists spammers support sites, such as those that sell spamming software, "bulletproof" email services or lists of harvested email addresses.
The Spamhaus SBL lists known spammers, spam gangs, spam operations and spam support services. SBL entries are backed up with evidence which has fully satisfied the Spamhaus Project team that the IP or netblock is under the control of a spam operation or a spam service.
The Open Relay DataBase is a non-profit organisation which stores a list of machines which are open (or insecure) SMTP relays. These relays are, or are likely to be, used as conduits for sending unsolicited bulk email.
An experimental service that lists those hosts that emit lots of spam relative to other types of email, based upon the spam reported using the main SpamCop service. The list will eventually be restricted but it can be freely used for now.
spambag.org is a personal list of networks whom the author believes actively or passively allow abusive or antisocial behavior. Examples of what he considers abusive or antisocial behavior are: spamming, mailbombing, mail server dictionary attacks, and web page E-mail address harvesting.
This DNSBL service lists those hosts which run an insecure version of Matt's Formmail script (used on lots of websites) which spammers are abusing to send spam. If you get lots of spam that seems to come from a feedback form, this list could help you! NOTE: This service has recently changed its policy so that out-of-date entries are no longer removed. Thus is will become progressively more inaccurate as time goes by.
(proxies.relays.monkeys.com) Lists various open proxies (insecure servers that can be used to access other servers and eventually send email) that are known to be used by spammers.
Arbitrary Blackhole List (or ABL) is a VERY AGGRESSIVE list of hosts known to be used by well-known spammers. It includes several popular hosts such as HotMail and Yahoo, so there is a high possibility it will mistake legitimate email for spam.
(Wirehub! Blackholes) This service lists the IP addresses of persistent spam sources, abusers scanning for open mail relays, abusers behind raped relays, open proxy servers, of spamvertizers and of spamvertized websites.
This lists parts if the Internet that are not compliant with RFC954, such as I.P. address with inaccurate or out-of-date information in IP whois records, and IP addresses which lack of any WHOIS service whatsoever. This list is not concerned with spam; however, the theory goes that those hosts not compliant with Internet protocols are more likely to facilitate other forms of network abuse (e.g. spam).
(NJABL) Not Just Another Bogus List. Lists known open relays, open proxies, insecure form-mail scripts and known spammers.
(blitzed.org) Lists open and insecure Wingate, SOCKS and HTTP proxies.
(DSBL) Distributed Server Boycott List. Another list of open proxies, open relays, and insecure form-mail scripts.
(DNSRBL) "Domain Name System Real-time Black List". Lists parts of the Internet that have sent mail to some "honey-pot" addresses that had no cause to receive any email.