_d81b5a6e5123d0ac7f359b6cc0f56105.pip-dev.axcient.com has no MX records.
Question and response
Question
dig _c618c4e933554e9806596d57cb85b622.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