Hi all,

On Fri, Nov 7, 2014 at 6:48 AM, Sanford Whiteman <figureone...@gmail.com>
wrote:

> > FWIW, there *is* a practical in-use (de facto if nothing else)
> convention of using _ in hosts for DKIM:
>
> _domainkey is actually in all the DKIM RFCs and in the formal STD 76,
> see § 3.6.2.1. Namespace, so it's more than a convention!


"_" is used for service name. Active Directory uses "_" a lot, for example.
e.g. _tcp, _sites, _ldap, etc.

https://tools.ietf.org/html/rfc2782

Regards,

--
Yasuo Ohgaki
yohg...@ohgaki.net

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