[dane] Speaking of mailbox names in the DNS
"John R Levine" <johnl@taugh.com> Sat, 14 November 2015 21:49 UTC
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Date: Sat, 14 Nov 2015 16:49:08 -0500
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From: John R Levine <johnl@taugh.com>
To: "dane@ietf.org" <dane@ietf.org>
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Subject: [dane] Speaking of mailbox names in the DNS
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Take a look at RFC 6763 on DNS-SD. Section 4.1.1 says you put the name of the service instance directly in the DNS as Net-Unicode which is basically UTF-8 minus control characters: ... Because Service Instance Names are not host names, they are not constrained by the usual rules for host names [RFC1033] [RFC1034] [RFC1035], and rich-text service subdomains are allowed and encouraged, for example: Building 2, 1st Floor . example . com . Building 2, 2nd Floor . example . com . Building 2, 3rd Floor . example . com . Building 2, 4th Floor . example . com . In addition, because Service Instance Names are not constrained by the limitations of host names, this document recommends that they be stored in the DNS, and communicated over the wire, encoded as straightforward canonical precomposed UTF-8 [RFC3629] "Net-Unicode" (Unicode Normalization Form C) [RFC5198] text. Since DNS-SD is widely deployed and the world hasn't come to an end, I don't see why mailbox names need anything else. This has the side effect of case folding ASCII characters, which some people appear to think is important. R's, John
- [dane] Speaking of mailbox names in the DNS John R Levine