Date: Mon, 18 Feb 2008 14:22:29 -0800 From: Doug Barton <dougb@FreeBSD.org> To: Guy Helmer <ghelmer@palisadesys.com> Cc: src-committers@FreeBSD.org, d@delphij.net, ache@nagual.pp.ru, cvs-all@FreeBSD.org, delphij@FreeBSD.org, cvs-src@FreeBSD.org, "M. Warner Losh" <imp@bsdimp.com> Subject: Re: cvs commit: src/lib/libc/resolv res_comp.c Message-ID: <47BA0525.8000700@FreeBSD.org> In-Reply-To: <47B99880.1060306@palisadesys.com> References: <200802160016.m1G0GnFB046558@repoman.freebsd.org> <20080216024541.GA31498@nagual.pp.ru> <20080215.233427.1598351542.imp@bsdimp.com> <47B7746A.8080403@delphij.net> <47B99880.1060306@palisadesys.com>
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Guy Helmer wrote: > I've been recently looking at DomainKeys, and underscores appear to be > typically used in the domain components for domain keys TXT records > (example below from > http://www.elandsys.com/resources/sendmail/domainkeys.html): > > mail._domainkey.example.com. IN TXT "k=rsa; t=y; > p=MEwwPQRJKoZIhvcNADAQCQADOwAwOAIxANPpYHdE2tevfEpvL1Tk2dDYv0pF28/f5MxU83x/0b > sn4R4p7waPaz1IbOGs/6bm5QIDAQAB" "example.com" is the domain name above. _domainkey.example.com is a hostname. There are no TLD registries that accept underscore in domain name registrations, but it's extremely difficult to determine reliably where the domain name ends and the hostname begins for all TLDs. This debate is one of the few negative fallouts of the robustness principle. Since others have refused to be "conservative in what they send" we are forced to be "liberal in what we accept" (as much as I find it distasteful on a personal level). Doug -- This .signature sanitized for your protection
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