Re: Backward compatibility with deployed SPF records (and choice of doma

On 6/26/2004 3:57 AM, Greg Connor wrote:

> The reason _spf prefix was dropped from SPF was NON-technical, but
> still an issue we should consider... people didn't understand it, and
> some still believed underscore was illegal, etc.
underscore is illegal for hostnames. service names are not hostnames.

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/