Date: Thu, 23 Apr 2015 17:44:24 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: Still not possible to send mail to domain libc.org On Thu, Apr 23, 2015 at 11:25:00PM +0200, Harald Becker wrote: > Hi Rich ! > > On 23.04.2015 22:52, Rich Felker wrote: > >Indeed, that does sound odd. I've filed a ticket with my registrar and > >for now I'm moving DNS hosting to my own nameserver but it may take 24 > >hours to update and propagate. Hopefully that fixes things. > > So let me retry the message tests tomorrow. > > >>I know this is not a prove, but it looks more like a general problem > >>... most likely, the mail relay is expecting to have the MX lookup > >>return an IP address, not a name. > > > >MX is never an IP address; that's not even valid and not possible to > >represent in DNS. It's always a name, and it's required to be an A > >record, not a CNAME. Check MX for any other domain and you'll find an > >A record. > > I'm not a DNS expert, so I may not use the correct notation. I can see. :-) > Currently the lookup has got even more ugly: > > nslookup -q=mx libc.org > > returns: brightrain.aerifal.cx > > .... but when I try to do MX lookup for brightrain.aerifal.cx, I > can't get any authoritative address, only for A records. This is expected. > Are you able to add also an MX entry for brightrain.aerifal.cx ? Why would you need one? An MX for brightrain.aerifal.cx would tell where to deliver mail sent to user@...ghtrain.aerifal.cx; it has nothing to do with mail sent to user@...c.org. > All the other domains I tried return an authoritative address for MX > lookups too, not only for A record lookup. > > I searched a bit on the net, and may be this hits a qmail DNS lookup > problem disused at different places. Looks like they are fighting > which strategy is best for the lookups ... this is bad, but I can't > do anything here. qmail is seriously buggy which is why most people abandoned it more than a decade ago... Rich
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