Date: 25 Dec 2002 14:29:44 -0800 From: swear@attbi.com (Gary W. Swearingen) To: Kurt Bigler <kkb@breathhost.net> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: email addresses used for lists [was: L0phtcrack] Message-ID: <79of793f6v.f79@localhost.localdomain> In-Reply-To: <BA2DF089.5927%kkb@breathhost.net> References: <BA2DF089.5927%kkb@breathhost.net>
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Kurt Bigler <kkb@breathhost.net> writes: > Well that's an interesting idea. Throw-away subdomains (excuse my > terminology - maybe I'm supposed to call them host names?) imply a whole > "host" of email addresses without wasting a domain name. No excuse needed, if my reading is correct. O'Reilly's "DNS and Bind" says "The hosts are there, but they're domains, too." It says that a domain contains all the hosts within the domain. (Leaf-node domains just contain one host and have no name server serving lower-level domains.) Another book seems to agree (and notes that hosts may have domain name aliases too). Note that a domain named "freebsd.org" may contain a host named "freebsd.org" as well as lower-level domains like "xxx.freebsd.org". And a domain named "xxx.freebsd.org" may contain a host named "xxx.freebsd.org" whether or not the domain has lower-level domains. Even if you don't accept the single-host domain idea, you can say that your "sub-domain" is just shorthand for "sub-domain name" which seems to be widely-acceptable shorthand for names within the domain tree all the way to the leaves, where, in this mind-set, there are no sub-domains. -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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