Our monitoring system alerted us to some emails delivery issues to mail.mil, and checking my local and some common resolvers, most are coming back with a SERVFAIL. Looking at our email server logs, first example was at 5:58 U.S. Central.
Google DNS is showing SERVFAIL while OpenDNS provides a response. Frank ============================================ DNS server: 8.8.8.8 ; <<>> DiG 9.7.3 <<>> MX mail.mil @8.8.8.8 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 26706 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 57 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Tue Oct 17 17:21:25 2017 ;; MSG SIZE rcvd: 26 ============================================ DNS server: 8.8.4.4 ; <<>> DiG 9.7.3 <<>> MX mail.mil @8.8.4.4 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 27422 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; Query time: 60 msec ;; SERVER: 8.8.4.4#53(8.8.4.4) ;; WHEN: Tue Oct 17 17:21:25 2017 ;; MSG SIZE rcvd: 26 ============================================ DNS server: 208.67.222.222 ; <<>> DiG 9.7.3 <<>> MX mail.mil @208.67.222.222 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53113 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; ANSWER SECTION: mail.mil. 2637 IN MX 10 pri-jeemsg.eemsg.mail.mil. mail.mil. 2637 IN MX 20 sec-jeemsg.eemsg.mail.mil. ;; Query time: 33 msec ;; SERVER: 208.67.222.222#53(208.67.222.222) ;; WHEN: Tue Oct 17 17:21:25 2017 ;; MSG SIZE rcvd: 86 ============================================ DNS server: 208.67.220.220 ; <<>> DiG 9.7.3 <<>> MX mail.mil @208.67.220.220 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45243 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.mil. IN MX ;; ANSWER SECTION: mail.mil. 3064 IN MX 20 sec-jeemsg.eemsg.mail.mil. mail.mil. 3064 IN MX 10 pri-jeemsg.eemsg.mail.mil. ;; Query time: 33 msec ;; SERVER: 208.67.220.220#53(208.67.220.220) ;; WHEN: Tue Oct 17 17:21:25 2017 ;; MSG SIZE rcvd: 86 ============================================ root@nagios:/tmp# _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
