Question and response
Question
dig mysmtp.com. MX
Answer
mysmtp.com. 600 MX 0 zmb-gate.mysmtp.com.
Authority
mysmtp.com. 3600 NS pdns02.domaincontrol.com.
mysmtp.com. 3600 NS pdns01.domaincontrol.com.
Additional
zmb-gate.mysmtp.com. 600 A 185.163.189.3
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0