Allowable reverse mapping zone file names

Tom Browder tom.browder at
Sat Aug 27 15:47:36 UTC 2016

I do not control 3-octet networks but need reverse mapping for my mail

Two questions:

1. Where is the doc that completely describes the allowable reverse mapping
zone file names?

2. When running my own authoritative name servers, do I need reverse
mapping for anything other than my single mail server?


Best regards,

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