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I’m researching SORBS (Spam and Open Relay Blocking System) and its function in DNS-based Blackhole Lists (DNSBLs).

My question is straightforward: Is SORBS limited to storing only IP addresses, or does it also catalog other types of data, such as domain names or URLs?

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  • It certainly catalogs domain names - it says as much in its documentation. I don't believe it catalogs URLS as if I understand correctly it uses DNS mechanisms for tests.
    – davidgo
    Commented Jan 5 at 22:55

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They catalog domain names and IP addresses, and may additionally group by their ASN and country. For example, here's their list of top 20 spamming IPs and domains:

http://www.sorbs.net/home/stats.shtml

Paraphrased from their Submissions page here: http://www.sorbs.net/listing/submission.shtml

What can be submitted to SORBS...?

Submissions to SORBS can be made for the following:

  • The Dynamic User/Host List (DUHL): This is a IP based list
  • The Bad DNS Config List: This is a domain based list
  • The No e-mail from this domain list: This is a domain based list

It only relates to email server addresses, so URLs are not involved. Take a look at their FAQ and their About Listings pages to learn about how and why they're used

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  • Could you provide me with an example of a real domain name that is listed in baddns or nomail? I couldn't find any, and it's really important for my research.
    – D.Bence
    Commented Jan 8 at 22:55
  • @D.Bence an example of what? Check their usage page for how to check against them or configure common applications to use it: us.sorbs.net/general/using.shtml . It's free to query the lists from any computer like nslookup 133.183.29.103.dnsbl.sorbs.net for example. At the bottom, they say you may request a local copy of the SORBS data by using the transfer request page. If you just want a single example, you should email them and ask for a sample domain from the nomail list to query.
    – Cpt.Whale
    Commented Jan 9 at 16:00

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