| Event Id | 1601 |
| Source | DNS |
| Description | DNS Server encountered the obsolete record type %1 in database file %2, line %3. The record was ignored. MD or MF record types are obsolete. They should be converted to MX record type which has the format: MX <preference value> <mail server domain name> |
| Event Information | Explanation: Resource Record Problem |
| Reference Links | DNS Event IDs 1 Through 1657 for Windows NT 4.0 SP4 |
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