A spam list is another name for a blacklist.

A spam list is a collection of domains or IP addresses meeting a certain criteria. Listing criteria and policies vary. Some spam list examples include known spam sources, IP addresses found to be open relays or proxies, dynamic residential IP space, domains or IP addresses which do not comply with RFC standards. Email traffic then can be filtered against a spam list to reject undesirable mail.

Habeas has three categories for the spam lists it tracks in the Reputation Monitor. The high priority lists have well-defined, published listing and removal policies to which the list maintainers adhere consistently. In addition, the high priority lists have a significant impact on deliverability. Listings on the high priority lists tend to be more accurate and have fewer false positives. Medium priority lists still have somewhat aggressive listing policies, but they also have well-defined policies for removing an entry from the list. These medium-priority lists may have some impact on deliverability. The lowest priority lists have aggressive listing policies which may cause false positives.

Top 10 Email Spam Lists:

1. Spamhaus Block List (SBL)

2. Composite Blocking List (CBL)

3. Not Just Another Bogus List (NJABL)

4. Distributed Sender Block List (DSBL)

5. Spam URI Realtime Block List (SURBL)

6. URI Block List (URIBL)

7. SpamCop

8. Spam and Open Relay Blocking System (SORBS)

9. Passive Spam Block List (PSBL)

10. Abusive Hosts Blocking List (AHBL)