I haven't investigated this thoroughly, but it seems like mail.mil is not returning MX records from certain DNS resolvers.
Frank ============================================ DNS server: 1.1.1.1 (Cloudflare DNS) ; <<>> DiG 9.7.3 <<>> MX mail.mil @1.1.1.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 49376 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 67 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Thu May 3 08:24:43 2018 ;; MSG SIZE rcvd: 26 ============================================ DNS server: 1.0.0.1 (Cloudflare DNS) ; <<>> DiG 9.7.3 <<>> MX mail.mil @1.0.0.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 39108 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 4171 msec ;; SERVER: 1.0.0.1#53(1.0.0.1) ;; WHEN: Thu May 3 08:24:47 2018 ;; MSG SIZE rcvd: 26 ============================================ DNS server: 8.8.8.8 (Google DNS) ; <<>> DiG 9.7.3 <<>> MX mail.mil @8.8.8.8 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 29691 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 34 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Thu May 3 08:24:42 2018 ;; MSG SIZE rcvd: 26 ============================================ DNS server: 8.8.4.4 (Google DNS) ; <<>> DiG 9.7.3 <<>> MX mail.mil @8.8.4.4 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 27285 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 76 msec ;; SERVER: 8.8.4.4#53(8.8.4.4) ;; WHEN: Thu May 3 08:24:42 2018 ;; MSG SIZE rcvd: 26 ============================================ _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
