care.yotta.com has no MX records.
Question and response
Question
dig e5d601390109452d8c975e25d4a439fe.v1.radwarecloud.net. MX
Answer
The response has no answer records.
Authority
radwarecloud.net. 300 SOA ns-cloud-c1.googledomains.com. cloud-dns-hostmaster.google.com. 9 21600 3600 259200 300
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0