SORBS Aggregate
Removal
Support ticket / self-service by zone
Cost
Free
Time to clear
Varies by sub-zone; can take days
About SORBS Aggregate
SORBS (Spam and Open Relay Blocking System, now run by Proofpoint) is really several lists under one query. Which sub-zone caught you dictates the fix — spam traps, open relay/proxy, or the dynamic (DUHL) list each have their own path.
Why an IP gets listed
- spam.dnsbl — the IP hit a SORBS spam trap.
- Open relay / open proxy zones — your server relays or proxies mail for strangers.
- DUHL — the IP looks dynamically assigned.
How to delist from SORBS Aggregate
- 1Look the IP up on the SORBS site to identify the exact sub-zone.
- 2Fix the cause: close the open relay/proxy, stop the spam, or (for DUHL) set proper static reverse DNS.
- 3Submit a delisting request through the SORBS support/ticket system, referencing the sub-zone and the remediation.
- 4Be patient and factual — SORBS delistings are reviewed and can take time.
Before you request removal: fix the root cause first — delisting while the problem persists almost always leads to a fast re-listing. Confirm the IP has valid reverse DNS, and that your SPF, DKIM and DMARC are in order.
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