mail.m101.em.secureserver.net has no AAAA records.
Question and response
Question
dig mail.m101.em.secureserver.net. AAAA
Answer
The response has no answer records.
Authority
secureserver.net. 3600 SOA cns1.secureserver.net. dns.jomax.net. 2026030525 300 600 1209600 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0