Question and response
Question
dig nelnet.net. MX
Answer
nelnet.net. 600 MX 0 nelnet-net.mail.protection.outlook.com.
Authority
nelnet.net. 3600 NS pdns04.domaincontrol.com.
nelnet.net. 3600 NS pdns03.domaincontrol.com.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0