protection.office365.us has no MX records.
Question and response
Question
dig protection.office365.us. MX
Answer
The response has no answer records.
Authority
protection.office365.us. 120 SOA ns1-35.azuregov-dns.us. hostmaster.protection.office365.us. 2025041825 10800 3600 604800 120
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0