_b2c1d7abaaf1d5cf9ecb976bccad15d9.api-q.axcient.com has no MX records.
Question and response
Question
dig _e47105cac9d29b16e630b4257ed52c62.tfmgdnztqk.acm-validations.aws. MX
Answer
The response has no answer records.
Authority
tfmgdnztqk.acm-validations.aws. 900 SOA ns-219.awsdns-27.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0