_c3ee562bef84ca43f443bfe6d652accb.api.axcient.com has no MX records.
Question and response
Question
dig _6f0486715f7908001d7453782e663f89.hkvuiqjoua.acm-validations.aws. MX
Answer
The response has no answer records.
Authority
hkvuiqjoua.acm-validations.aws. 900 SOA ns-2003.awsdns-58.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0