mta3.wealhbt.com has no CNAME records.
Question and response
Question
dig mta3.wealhbt.com. NS
Answer
The response has no answer records.
Authority
wealhbt.com. 1799 SOA hattie.ns.cloudflare.com. dns.cloudflare.com. 2395315081 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0