Paul Wouters wrote: > On Tue, 26 May 2015, Paul Vixie wrote: > >>> Saying there is a concern with dotless MAIL is an easy sell, my >>> question was on issues with not-dotless MAIL. >> >> i agree with ruben. i know of a lot of local uses of HOME, CORP, and >> LOCAL, where non-dotless names inside some network perimeter have local >> meaning. i know of no instance of MAIL being used that way. > > How do 15 year old OSes and applications implement and interact for > "search domains". > > The answer is "very differently and often very wrongly". > > Are we sure that an application querying "mail" will still end up > receiving > an A record for mail.corp.com. when mail. is delegated.
yes. i wrote a lot of the 15-year-old code in question. (actually some of it is 25 years old.) NOERROR vs. NXDOMAIN doesn't matter. all that matters is that there is no AAAA or A RR at "MAIL.", and that's already a rule, so what we're discussing here (your mail.corp.com example) will not be impacted. your example is spot-on when it comes to CORP, HOME, or LOCAL, or to dotless domains, but not to *.MAIL. -- Paul Vixie _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
