On 01/05/2018 01:41 PM, Dimitri Maziuk wrote: > On 01/05/2018 11:49 AM, Ruben Safir wrote: > >> SMTPHost seems to do a non-mx record lookup for the value ... which is a >> little strange. > When you look up a *host*, you look for A/PTR or CNAME.
No, all dns look ups are for hosts. Since this is SMTP, it would be proper to assume it is an mx host > When you look up > an MX, you can look up an MX for a *domain*, *or* you could look up an > MX for a *host*. NO NO NO You are looking up a host. You can do that with a domain name, or a specific host name, but you are looking up for a HOST, or more than a single host with rankings, with a specific ip addresses. [ruben@flatbush ~]$ dig mx gmail.com ; <<>> DiG 9.11.2 <<>> mx gmail.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45910 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 6 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: 55cb7894025bd1ae2219142e5a4fd300fac0b1a609978ecb (good) ;; QUESTION SECTION: ;gmail.com. IN MX ;; ANSWER SECTION: gmail.com. 3487 IN MX 40 alt4.gmail-smtp-in.l.google.com. gmail.com. 3487 IN MX 30 alt3.gmail-smtp-in.l.google.com. gmail.com. 3487 IN MX 10 alt1.gmail-smtp-in.l.google.com. gmail.com. 3487 IN MX 20 alt2.gmail-smtp-in.l.google.com. gmail.com. 3487 IN MX 5 gmail-smtp-in.l.google.com. ;; AUTHORITY SECTION: gmail.com. 161107 IN NS ns1.google.com. gmail.com. 161107 IN NS ns3.google.com. gmail.com. 161107 IN NS ns4.google.com. gmail.com. 161107 IN NS ns2.google.com. ;; ADDITIONAL SECTION: gmail-smtp-in.l.google.com. 296 IN A 209.85.232.26 ns2.google.com. 161618 IN A 216.239.34.10 ns1.google.com. 161618 IN A 216.239.32.10 ns3.google.com. 161618 IN A 216.239.36.10 ns4.google.com. 161618 IN A 216.239.38.10 ;; Query time: 1 msec ;; SERVER: 10.0.0.37#53(10.0.0.37) ;; WHEN: Fri Jan 05 14:33:20 EST 2018 ;; MSG SIZE rcvd: 341 [ruben@flatbush ~]$ dig gmail-smtp-in.l.google.com ; <<>> DiG 9.11.2 <<>> gmail-smtp-in.l.google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3649 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 5 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: e107a7eb3dd41c69bad19c635a4fd3209ed6a84ada3378fd (good) ;; QUESTION SECTION: ;gmail-smtp-in.l.google.com. IN A ;; ANSWER SECTION: gmail-smtp-in.l.google.com. 264 IN A 209.85.232.26 >I expect in most cases if you query for MX for > SMTP*Host* you'll get nothing -- I wonder how many admins define MXers > for each host these days. > > It shouldn't need FQDN though, it should add search domain suffix(es) > from /etc/resolv.conf. > > -- -- So many immigrant groups have swept through our town that Brooklyn, like Atlantis, reaches mythological proportions in the mind of the world - RI Safir 1998 http://www.mrbrklyn.com DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.com - Leadership Development in Free Software http://www2.mrbrklyn.com/resources - Unpublished Archive http://www.coinhangout.com - coins! http://www.brooklyn-living.com Being so tracked is for FARM ANIMALS and and extermination camps, but incompatible with living as a free human being. -RI Safir 2013 ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org