Question and response
Question
dig send-box.ru. MX
Answer
send-box.ru. 3600 MX 10 mailer01.send-box.ru.
Authority
send-box.ru. 3600 NS ns2.mail.ru.
send-box.ru. 3600 NS ns1.mail.ru.
Additional
ns1.mail.ru. 600 A 217.69.139.112
ns1.mail.ru. 600 AAAA 2a00:1148:db00:0:0:0:0:2
ns2.mail.ru. 600 A 94.100.180.138
ns2.mail.ru. 600 AAAA 2a00:1148:db00:0:0:0:0:1
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0