<SIZE> bytes, 1+2+2+3 records, response, noerror
query: MX sub.example.xx
answer: sub.example.xx 86400 CNAME ns1.a.example.xx
answer: sub.example.xx 86400 RRSIG CNAME 7 3 86400 <TIME> <TIME> 44495 example.xx <SIG>
authority: a.example.xx 259200 NS ns1.a.example.xx
authority: a.example.xx 259200 NS ns2.a.example.xx
additional: . 0 OPT 512 0 0 8000
additional: ns1.a.example.xx 259200 A 192.0.2.5
additional: ns2.a.example.xx 259200 A 192.0.2.6
