smtptr36.fortimailcloud.com has no AAAA records.
Question and response
Question
dig smtptr36.fortimailcloud.com. AAAA
Answer
The response has no answer records.
Authority
fortimailcloud.com. 120 SOA ns3.fortinet.com. mis.fortinet.com. 2026014213 10800 15 604800 120
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0