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  以下を見ると、"_"は使えるようだ。

https://help.onamae.com/answer/7894

1. underscore character

http://domainkeys.sourceforge.net/underscore.html

Underscores allowed, except in host names

Examples of underscores in RFCs and in use

RFCで言及されている使い方がある。これらは広く認められている。

BCP

Scoped Interpretation of DNS Resource Records through "Underscored" Naming of Attribute Leaves

https://ftp.ripe.net/rfc/v3test/test8552.v2v3.html

2. onamae

https://omohikane.com/aws_acm_dns_validate_xserver/

  • お名前もxserverも文書には「_は使えない」とあるらしいが、実際には書けるらしい。 以下を見ると、"_"は使えるようだ。

https://help.onamae.com/answer/7894

MoinQ: DNS/character/underscore (last edited 2020-08-24 14:59:14 by ToshinoriMaeno)