Spamhaus DNSBL return codes: technical update
ID: 7b0f95a2-f8be-54e2-9e8a-d13143bee0cd
STIX ID: report--7b0f95a2-f8be-54e2-9e8a-d13143bee0cd
Feed Name: The Spamhaus Project
Spamhaus announces a new DNSBL error return-code range (127.255.255.0/24) used to indicate query errors and warns developers not to interpret these codes as reputation listings. The notice urges correct parsing of DNSBL responses, provides links to configuration guidance for MTAs, and clarifies that these codes are only present on public zone mirrors (not on DQS/rsync clients).
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