DNS/EDNS/tinydnsについて、ここに記述してください。

$ dig +edns=0 -t txt longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp @127.0.0.1

; <<>> DiG 9.12.1 <<>> +edns=0 -t txt longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49902
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. INTXT

;; ANSWER SECTION:
longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. 60IN TXT "verylonglonglonglonglonglonglonglong0.longlonglonglonglonglonglonglong.qmail.jp"
longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. 60IN TXT "verylonglonglonglonglonglonglonglong4.longlonglonglonglonglonglonglong.qmail.jp"
longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. 60IN TXT "verylonglonglonglonglonglonglonglong4.longlonglonglonglonglonglonglong4.qmail.jp-3"
longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. 60IN TXT "verylonglonglonglonglonglonglonglong1.longlonglonglonglonglonglonglong.qmail.jp-2"
longlonglonglonglonglonglonglong.longlonglonglonglonglonglonglong3.qmail.jp. 60IN TXT "verylonglonglonglonglonglonglonglong3.longlonglonglonglonglonglonglong3.qmail.jp-3"

;; Query time: 36 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jul 23 00:07:01 JST 2018
;; MSG SIZE  rcvd: 572