Question and response
Question
dig mx.ipv6.zsttk.net. SRV
Answer
The response has no answer records.
Authority
ipv6.zsttk.net. 86400 SOA ns.zsttk.ru. hostmaster.zsttk.ru. 2018082100 43200 3600 2419200 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0