Question and response
Question
dig smtp.masterhost.ru. MX
Answer
smtp.masterhost.ru. 900 MX 10 smtp.masterhost.ru.
Authority
The response has no authority records.
Additional
smtp.masterhost.ru. 900 A 90.156.132.122
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0