Spamhaus Block List (SBL)
All IPs on the SBL belong to known spammers, spam gangs, or spam support services. The SBL includes IPs from both the ROKSO database and IPs of spam services listed in the Spamhaus database.

Spamikaze
Automated spam blocklist system, designed to block spam at the SMTP level.

Spamware Vendor List
List of live spamware sites and related links.

The Abusive Hosts Blocking List (AHBL)
Publishes a list of known abusive hosts (open relays, open proxies, spam sources, DoS drones, and more) in various forms including a DNSbl.

The South Korea Blocking List
Blocking list to filter out Korean spam.

The Spamhaus Project Register of Known Spam Operations (ROKSO)
The Spamhaus Project's Register Of Known Spam Operations (ROKSO) Database. ROKSO collates evidence on known hard-line spam outfits that have been thrown off Internet Service Providers over three times.

UCE Protect Network
Attempt to generate a free realtime black list of spammer IP numbers.

Whois-Details for Blacklisted Spam Domains
List of domains that have been advertised via spam, with name server, registration date, registrant. This list is updated daily.

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