In message <20100316131539.ga10...@fantomas.sk>, Matus UHLAR - fantomas writes: > > > On 16.03.10 09:45, Ruben Laban wrote: > > > > In my logs I see numerous line like these: > > > > > > > > Mar 16 04:59:13 mx02 named[4606]: unexpected RCODE (SERVFAIL) > > > > resolving 'hotmeil.com/MX/IN': 10.2.1.3#53 > > > > Mar 16 04:59:14 mx02 named[4606]: unexpected RCODE (SERVFAIL) > > > > resolving 'hotmeil.com/MX/IN': 10.0.1.3#53 > > > > Mar 16 04:59:15 mx02 named[4606]: unexpected RCODE (SERVFAIL) > > > > resolving 'hotmeil.com/MX/IN': 10.1.1.3#53 > > > In message <20100316090709.gc7...@fantomas.sk>, Matus UHLAR - fantomas writ > es: > > > the microsoft's nameservers are providing only A and TXT records for > > > hotmeil.com. They return ". IN SOA (NOERROR)" for other questions. > > > This is apparently invalid and causes the SERVFAIL. > > > > > > seems it's time to blame microsoft. > > On 16.03.10 23:43, Mark Andrews wrote: > > And the lack of a way to register a name in COM without creating a > > delegation. And the lack of a way to say this domain name is not > > a valid email domain. > > It's apparently because DNS was designed to provide records that exist, not > those that do not.
Actually it's designed to provide records that exist *and* to tell you when they don't exist. Reserving namespace is outside of the DNS itself. > > The best thing would be for hotmeil.com to always return NXDOMAIN > > and people would correct their spelling errors. Unfortunately there > > is not way to register hotmeil.com without creating a delegation > > and you could you have these ISP's that hijack NXDOMAIN and rewrite > > it so you get a A record instead of NXDOMAIN. > > > So Microsoft have to supply a A record but they don't want it to > > be used for email so they need to break the MX lookup so MTA's soft > > fail and eventually (days later) return the email to the sender. > > You can also register a domain and not provide any records for it (except > SOA and NS), which would be best in current situation imho. > > However Microsoft decided to provide A records for hotmeil.com (and > www.hotmeil.com too), so they don't want people to fix their typos, but are > doing it themselves instead. They are kind of forced to these days due to the abuse of the DNS by ISP's. > Yes, there could be way to define a domain that has A record but does not > provide mail service. Unluckily, in case of MX nonexistance the A is used > (as implicit zero-priority MX). Which is why "MX 0 ." is needed. We have it for SRV "SRV 0 0 ." means there is no service. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users