Hey, I havent fixed this yet, but i've found that the system im running is missing the following patch, so ignore my message.
23 - remove cname lookup from qmail-remote (https://lists.gt.net/qmail/users/138190) - carryover Thanks, J On Wed, Mar 31, 2021 at 1:21 AM Jaime Ventura <jaimevent...@gmail.com> wrote: > Hey all, > > A couple of days ago, my server was complaining with "CNAME lookup failed > temporarily" when delivering emails to domain "repsol.com". > > At first i couldn't understand what the problem was. Querying MX records > for that domain returned valid results. > > I turned to the dns caching server, and noticed that qmail is making a "IN > ANY" query before actually doing a "IN MX". > > For instance, when delivering an email to google: > > Mar 31 01:03:24 mail named[24968]: client 127.0.0.1#53542: query: > gmail.com IN ANY + (127.0.0.1) > Mar 31 01:03:24 mail named[24968]: client 127.0.0.1#57416: query: > gmail.com IN MX + (127.0.0.1) > > I noticed that the same query for "repsol.com" resulted in failure. > > $dig @8.8.8.8 in any repsol.com > > ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8 <<>> @8.8.8.8 in any > repsol.com > ; (1 server found) > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 27672 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 > > ;; QUESTION SECTION: > ;repsol.com. IN ANY > > ;; Query time: 2036 msec > ;; SERVER: 8.8.8.8#53(8.8.8.8) > ;; WHEN: Wed Mar 31 01:13:42 2021 > ;; MSG SIZE rcvd: 28 > > > > I wonder why qmail is issuing a "IN ANY" query. > > Also, I'm finding some info on the internet referring to the idea of > deprecating the support to "in any" queries, like this one: > https://blog.cloudflare.com/deprecating-dns-any-meta-query-type/ > > > So, any thoughts about this? Am i wrong about qmail doing "IN ANY" queries > before "IN MX" queries? Im afraid this may this pose a problem in the > (near) future in case everybody starts deprecating the "IN ANY" queries. > > cheers, > > J > >
