I haven't been able to figure out a minimal way to reproduce this, but the following comment seems to break in the HTML email view (see F505888 for a screenshot).
.com.jm is back to normal:
$ dig NS redacted.com.jm ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> NS redacted.com.jm ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20955 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 5 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;redacted.com.jm. IN NS ;; ANSWER SECTION: redacted.com.JM. 1657 IN NS REDACTED. redacted.com.JM. 1657 IN NS REDACTED. redacted.com.JM. 1657 IN NS REDACTED. redacted.com.JM. 1657 IN NS REDACTED. ;; ADDITIONAL SECTION: REDACTED. 10995 IN A 1.2.3.4 REDACTED. 11137 IN A 1.2.3.4 REDACTED. 18955 IN A 1.2.3.4 REDACTED. 11342 IN A 1.2.3.4 ;; Query time: 2 msec ;; SERVER: 127.0.1.1#53(127.0.1.1) ;; WHEN: Tue Jun 16 11:08:58 AEST 2015 ;; MSG SIZE rcvd: 267 $ dig www.redacted.com.jm ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> www.redacted.com.jm ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26842 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.redacted.com.jm. IN A ;; ANSWER SECTION: www.redacted.com.jm. 8 IN A 1.2.3.4 ;; Query time: 0 msec ;; SERVER: 127.0.1.1#53(127.0.1.1) ;; WHEN: Tue Jun 16 11:09:09 AEST 2015 ;; MSG SIZE rcvd: 66 $ dig www.redacted.com.jm ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> www.redacted.com.jm ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 905 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.redacted.com.jm. IN A ;; ANSWER SECTION: www.redacted.com.jm. 1 IN A 1.2.3.4 ;; Query time: 0 msec ;; SERVER: 127.0.1.1#53(127.0.1.1) ;; WHEN: Tue Jun 16 11:09:16 AEST 2015 ;; MSG SIZE rcvd: 66 $ dig www.redacted.com.jm ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> www.redacted.com.jm ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42492 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 5 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;www.redacted.com.jm. IN A ;; ANSWER SECTION: www.redacted.com.jm. 60 IN A 1.2.3.4 ;; AUTHORITY SECTION: redacted.com.jm. 81865 IN NS REDACTED. redacted.com.jm. 81865 IN NS REDACTED. redacted.com.jm. 81865 IN NS REDACTED. redacted.com.jm. 81865 IN NS REDACTED. ;; ADDITIONAL SECTION: REDACTED. 89670 IN A 1.2.3.4 REDACTED. 89784 IN A 1.2.3.4 REDACTED. 107610 IN A 1.2.3.4 REDACTED. 90323 IN A 1.2.3.4 ;; Query time: 6 msec ;; SERVER: 127.0.1.1#53(127.0.1.1) ;; WHEN: Tue Jun 16 11:09:17 AEST 2015 ;; MSG SIZE rcvd: 270