SUMMARY

DNS error codes.

DETAIL

This article lists typical WIN32 DNS return codes. These return codes may appear in the SMTP Debug log file if the DNS is either incorrectly configured or there are DNS Errors being returned from the DNS Server:

9001	DNS server unable to interpret format.
9002	DNS server failure.
9003	DNS name does not exist.
9004	DNS request not supported by name server.
9005	DNS operation refused.
9006	DNS name that ought not exist, does exist.
9007	DNS RR set that ought not exist, does exist.
9008	DNS RR set that ought to exist, does not exist.
9009	DNS server not authoritative for zone.
9010	DNS name in update or prereq is not in zone.
9016	DNS signature failed to verify.
9017	DNS bad key.
9018	DNS signature validity expired.
9501	No records found for given DNS query
9502	Bad DNS packet
9503	No DNS packet 9504: DNS error, check rcode
9505	Unsecured DNS packet
1460	Timeout - This operation returned because the timeout period expired

MORE INFORMATION

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