On 2022/09/22 13:35, Renaud Allard wrote: > > > On 9/22/22 13:05, Stuart Henderson wrote: > > > > Note that this domain has bogus DNS records and mail will fail anyway. > > > > > > > > habitium.fr mail is handled by 10 _dc-mx.4063971290c7.habitium.fr. > > > > # host _dc-mx.4063971290c7.habitium.fr > > > > _dc-mx.4063971290c7.habitium.fr has address 212.63.111.139 > > > > Host _dc-mx.4063971290c7.habitium.fr not found: 3(NXDOMAIN) > > > > btw I don't see anything _all_ that wrong with DNS, the underscore is not > > really legit but lookup/connections do work > > The underscore is clearly not the best practices and should be avoided. > But the NXDOMAIN after the resolve is not normal either, and it's not DNSSEC > related.
Not normal but not that unusual and it's only returned when host(1) is querying the AAAA. My main point being that things are not bogus enough that mail is likely to actually fail.
