[dns-operations] about the underline in hostname

[Fon]

http://domainkeys.sourceforge.net/underscore.html
On 29 May 2014 10:28, "hua peng" <huapeng at arcor.de> wrote:

> I found this is a valid RR:
>
> _spf.yandex.ru.         2768    IN      TXT     "v=spf1
> include:_spf-ipv4.yandex.ru include:_spf-ipv6.yandex.ru ~all"
>
>
> But for A, CNAME, AAAA etc, the underline in hostname is invalid.
> Does this make a confusion?
>
> Thanks.
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