0spam NBL (New/Unknown)
nbl.0spam.org
Operated by 0spam.org
Avg removal time
24–72 hours
This blacklist affects deliverability at a subset of mail servers. Still worth resolving.
About 0spam NBL (New/Unknown)
0spam.org's NBL zone lists newly seen or unknown IP addresses that have not established a positive sending reputation. It helps identify potential spam from new sources.
Why am I listed?
IPs with no established reputation in the 0spam network, particularly those that appear suddenly with high sending volumes, are listed.
How to get delisted
Follow these steps in order to request removal from 0spam NBL (New/Unknown).
- 1
Check your listing at 0spam.org.
- 2
Build a positive sending reputation through consistent, authenticated legitimate email sending.
- 3
Ensure proper reverse DNS, SPF, DKIM, and DMARC are configured.
- 4
Submit a removal request if you are a legitimate new sender.
- 5
Gradually warm up sending volume on new IPs.
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