> >> Quoth Bob Cox at 2009-03-18 18:39... > >> >The question is whether you should be rejecting email from any user > >> >@act.gov.au just because act.gov.au does not resolve. > > > >On 18.03.09 19:31, Matthew Smith wrote: > >> we need to > >> be tolerant of such things as MX records not having corresponding A > >> records - even though it makes our spam-filtering configuration that > >> much harder.
> On Friday 20 March 2009 10:02:56 Matus UHLAR - fantomas wrote: > >If a domain doesn't resolve, it's not available for e-mailing, thus it > >should not be used in mail addresses (you can't mail there, you can't bounce > >there...). On 20.03.09 16:10, Boyd Stephen Smith Jr. wrote: > If it has an MX record, it is available for mailing. The A record is an old > fall-back that is not required for proper mail delivery. > > The name contained in the MX record must (since an address is required to > establish the SMTP connect) have an A or AAAA record, but the right-hand side > of the email does not *have* to. So it depends on what anyone means by "domain does not resolve". If it has MX, I don't take it as "does not resolve" from the SMTP point of view. and I think that the error message meant just that, not that "it does not resolve to an A record" I guess that the original problem was by (temporary) error with resolving - act.gov.au. has one NS servers, one MX pointing at mail.act.gov.au., which has another NS servers. The resolution errors may apear ocasionally appear if some of delegation/authoritative NS records do not match, not talking about mistake in DNS configuration. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Quantum mechanics: The dreams stuff is made of. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
